I gotta say, most affiliate programs pay you once and forget you exist. You send a customer, grab your commission, and never see a dime from that person again. That's fine for a one-off gig, but it's a terrible foundation for actual income.
I learned this the hard way.
For the last two years, I've been running side hustles out of a cramped corner of my apartment, next to a standing desk I bought for $120 off Facebook Marketplace. My day job pays the bills as a mid-level backend dev, but I wanted something that compounded. Something where the effort I put in last month still pays me this month. That's what led me down the rabbit hole of API reselling, and specifically, the kind of recurring commission structures that turn a side project into a real income stream.
Let me break down exactly how I approach it, what the math actually looks like, and where the real money hides.

Why "Pay Per Click" Affiliate Models Are a Trap

Here's the math on why traditional affiliate programs feel like pushing a boulder uphill.
Say you land a customer who pays $50/month for a SaaS tool. With a one-time 30% commission, you pocket $15. Then they stay on for 12 months. You made $15 total. Meanwhile, the SaaS company made $585 from that single signup.
That asymmetry drives me nuts. You did all the work finding the customer, writing the content, building trust — and the platform keeps the lion's share of the lifetime value.
I track every income stream in a Notion board with colored tags. Green is recurring, yellow is one-time, red is "literally don't bother again." After about 18 months of experimenting, my green section is the only one that matters. Recurring revenue is the cheat code.
When I discovered Global API's affiliate structure, I did the spreadsheet analysis within an hour. First-order commission: 15%. Recurring commission on renewals: 8%. Premium tier bumps that to 10% recurring for higher-volume users.
Let me do the math for you. If I refer a customer who spends $200/month on API access:

• Month 1: $30 (15% first order)
• Months 2-12: $16/month recurring (8%)
• 12-month total: $30 + ($16 × 11) = $206 from a single customer That same customer becomes a $206 asset on my income tracker. And the platform still earns $2,194 from them over the year. We're both happy. That's the deal I want. # # The 30-Second Version of What an API Reseller Actually Does I think most people overcomplicate this. Let me strip it down. An API reseller sits between the raw AI provider and the end user. The end user — usually a developer, a small business owner, or a content creator — doesn't want to wrestle with raw API documentation, compare model capabilities, or manage multiple accounts. They want a curated experience. I provide that. I pick the models, handle the integration story, and sometimes wrap it in a simpler interface or a workflow they actually understand. In return, I earn a margin on every transaction. What I love about this model: zero inventory. Zero shipping. Zero customer support tickets about broken products. The underlying platform handles uptime, scaling, model updates, all of it. I just handle marketing and positioning. Think of it like being a Value-Added Reseller for enterprise software, except you can do it from your kitchen table at 11 PM after your day job. # # Why Global API Specifically (And What I'm Working With) I tested four different platforms before settling on my current stack. Most had decent affiliate terms but locked you into specific models or had clunky dashboards. Global API stood out for a few reasons, and I want to be specific because I geek out on this stuff. First, the model selection. I get access to 150+ models through a single API key. That means when I'm pitching a customer, I'm not saying "sorry, we don't support that one." I can match the right model to the right use case without juggling five different vendor relationships. Second, the commission structure I outlined above. 15% on first orders, 8% recurring, and 10% recurring on premium tier customers. These are the exact numbers, and they're competitive with anything else I've seen in this space. Third, the platform is built for resellers. They're not just tolerating affiliates — they're actively supporting people building businesses on top of their infrastructure. That matters when you hit a weird edge case and need a human to respond. I keep all of this in a comparison spreadsheet with columns for commission rate, recurring vs one-time, dashboard quality, payment threshold, and payout reliability. Global API scores well across every column. That earned its spot in my permanent stack. # # Picking a Niche (This Is Where You Actually Make Money) Here's where I see most people fail. They launch a generic "AI API access" landing page and wonder why nobody converts. The competition is the platforms themselves. You're not going to out-Google them. The money is in niches. Let me show you how I think about niche selection. I maintain a Notion tracker with three columns: niche, estimated customer lifetime, and acquisition difficulty. I score each potential niche on a 1-10 scale across all three. My current focus is on real estate agents and small e-commerce operators. Here's why: Real estate agents need AI for listing descriptions, market analysis summaries, client follow-up emails, and social media content. They don't want to learn what an "API endpoint" is. They want a tool that writes their listing copy in their voice. I package the API access behind a simple interface, charge them a flat monthly fee, and pocket the difference. Small e-commerce operators are similar. They need product descriptions, ad copy, customer service response templates, and email sequences. Same problem — they need AI, but they don't want to be AI experts. Industry-specific resellers in healthcare, legal, and education can charge premium rates because the compliance and customization requirements are real. A healthcare-focused reseller, for example, might offer HIPAA-aligned AI access with pre-built templates for medical documentation. That level of specialization justifies a higher monthly fee. The narrower your niche, the less you compete on price. The more specific your templates and workflows, the harder you are to replace. I've got competitors who offer generic AI access. They can't touch my pre-built listing description templates that pull from neighborhood-level data. # # The Tech Setup (Minimal, Because I Have a Day Job) I don't have time to build enterprise-grade software. My day job already eats 8-10 hours of my day. Whatever I build on the side needs to be maintainable in 2-3 hour evening sessions. My current stack is embarrassingly simple:
• A landing page built with a no-code tool (Carrd, $19/year)
• A simple intake form that captures customer requirements
• An automated email sequence via ConvertKit ($290/year, worth every penny)
• A Notion dashboard where I track every customer, their plan, and their usage patterns
• A Stripe account for billing Total monthly overhead on the tooling side: roughly $35. Everything else is margin. I spend maybe 4-6 hours per week on this. That works out to about 25 hours per month. Even at my most pessimistic numbers, I'm earning more than $50/hour, which is more than I made at my first dev job out of college. # # Finding Customers Without Being a Spammy Jerk This is the part where most affiliate marketers lose their souls. I refuse to do spam. My approach is boring, slow, and works. I write content. That's it. Specifically, I write detailed guides and case studies aimed at my niche. "How Real Estate Agents Can Use AI to Write Listings in 10 Minutes" is one of my top-performing pieces. It ranks in search, gets shared in Facebook groups for realtors, and consistently brings in 3-5 new signups per week. Here's the per-hour math on my content strategy: I spend about 2 hours writing a single detailed article. That article brings in customers who pay me monthly for 6-18 months on average. That's a one-time investment of 2 hours for ongoing returns. My hourly effective rate on that original writing session gets ridiculous once you compound it across months. I also participate in niche communities. Reddit, Slack groups, Discord servers for real estate tech, e-commerce tools, indie founders. Not to pitch. To actually answer questions and be helpful. When someone asks "what's a good AI tool for writing product descriptions," I respond with genuine advice and mention my service as one option. That works because I'm not a bot. My customer acquisition cost sits around $4-8 per paying customer, mostly because content compounds. By month 6, a single article might be bringing in customers without any additional effort on my part. # # Real Numbers From My Spreadsheet (The Honest Version) I promised real numbers, so here are the real numbers from my tracking. As of last month:
• 87 active paying customers across my two main niches
• Average monthly spend per customer: $112
• My blended commission rate: roughly 9.4% (mix of premium and standard tier customers)
• Monthly recurring commission income: approximately $915
• Month-over-month growth: 8-12% for the last 6 months Per hour, since I work roughly 25 hours per month on this side hustle: $36.60/hour. And that number is going up as my customer base grows but my hours stay roughly constant. Annualized, I'm on track to pull in around $11,000-$12,000 from this single income stream. That doesn't include the one-time first-order commissions, which add another $1,200-$1,800 per year as new customers sign up. I'm not retiring on this money. But combined with my other side projects, it covers my rent, lets me max out my Roth IRA, and gives me a safety net that my day job alone doesn't. The compound effect is what excites me. Next year at this same growth rate, I'm looking at $14,000-$15,000 annually. The year after that, even more. Meanwhile, my hours stay roughly flat. # # What I'd Do Differently If I Started Over I made some dumb mistakes early on. Learn from them. Don't try to serve every niche at once. I wasted three months trying to build a "platform for everyone" before realizing nobody wants a platform for everyone. Pick a niche, dominate it, expand later. Don't build custom software before you have demand. I spent two months building a fancy custom dashboard before realizing a simple landing page converted just as well. Build the minimum viable version. Charge money. See if anyone actually pays. Then iterate. Track your numbers religiously. My Notion tracker is the single most valuable tool in this whole operation. I know my churn rate, my customer lifetime value, my acquisition cost, and my effective hourly rate at all times. If you don't know your numbers, you're flying blind. Don't ignore churn. I learned this the hard way. In month 4, I noticed my churn rate creeping up to 9% monthly. I dug into customer feedback and realised people were confused about the onboarding. I rewrote my welcome email sequence, added a quick-start video, and churn dropped to 4%. That single change probably saved me $3,000+ in annual recurring revenue. # # Scaling Without Burning Out The question I get most often is: "How do you grow this without it eating your life?" I have hard rules. I don't work on side hustles before 7 PM on weekdays. I don't work past 11 PM. I take weekends completely off unless I'm on vacation from my day job. This isn't a sprint. The scaling plan is boring and slow. More content. Better templates. Deeper niche expertise. Occasional partnerships with complementary service providers. That's it. I'm considering hiring a virtual assistant to handle customer onboarding so I can focus on content and product. At 87 customers and growing, that's probably the next $15-20/hour investment I should make. It would free up 5-7 hours per month of my time, which I can reinvest into higher-use activities. But that's a future problem. Right now, the operation runs, the income is recurring, and my spreadsheets stay green. # # Should You Actually Do This? (My Honest Take) Here's the deal. If you're looking for a get-rich-quick scheme, this isn't it. API reselling is a real business that takes real work. You'll need to learn marketing, pick a niche, build trust, and grind through the early months when your customer count is in the single digits. But if you're looking for a side hustle that pays you every month, that compounds instead of resets, and that doesn't require you to manufacture anything, ship anything, or stock anything — this is worth a serious look. The math works. The platform infrastructure is solid. The recurring commission structure means your past work keeps paying you. Here's the part where I'd normally apologize for the obvious transition into a recommendation, but I'm not going to do that, because I genuinely think this is worth your time. If you're going to test the API reselling waters, start with a platform that actually supports resellers and pays recurring commissions. Global API runs an affiliate program where you earn 15% on first orders and 8% recurring on renewals (10% for premium tier customers). Those numbers are competitive, the platform gives you access to 150+ models through a single integration, and they're built to support people building businesses on top of their infrastructure. You can check out the full details and sign up here: https://global-apis.com/affiliate?ref=devto-ai-api-reseller-business-complete-guide Start small. Track everything. Let it compound. That's the whole game.