Honestly, every Sunday night I open the same Notion database. It's nothing fancy — just a table called "Side Hustle Income Tracker" with rows for each affiliate program, columns for MRR, one-time bonuses, and the date I joined. Last Sunday the total said $2,847.17 for the month of October, and I stared at it for a while because I still can't fully believe that a bunch of links I sprinkled into blog posts and YouTube descriptions pay my car insurance.
I'm a backend dev at a mid-sized SaaS company. Day job pays well, but I've always wanted a second income stream that doesn't require trading more hours for more dollars. Affiliate programs hit that sweet spot: write once, earn repeatedly. After about 18 months of experimenting, here's the actual breakdown of where my numbers come from — and how I'd build the stack from zero if I were starting today.
What I'm Actually Promoting Right Now
I run five affiliate partnerships at the moment. Two are software products I genuinely use (a deploy tool and a logging service). One is a hosting company. The other two are AI infrastructure platforms — and those are where the interesting growth is happening.
Global API is the one I'll talk about most here because it's the program I've tracked the longest in this category. They give you access to 150+ AI models through a single dashboard, which matters for the people I'm recommending it to (mostly indie devs and small teams who don't want to juggle six different API keys). Their affiliate terms are simple: 15% on the first order, 8% recurring for as long as the customer stays subscribed, and 10% on premium tiers.
Let me put those numbers into my usual framework — actual dollars per plan:
- Pro plan ($19.99/mo): You earn $3.00 on signup, then $1.60 every month after that.
- Business plan ($49.99/mo): $7.50 upfront, $4.00 monthly recurring.
- Scale plan ($149.99/mo): $22.50 upfront, $12.00 monthly recurring. Here's the math on why I focus most of my content energy on the Business and Scale tiers: a single Scale referral pays me $22.50 the day someone signs up, then $12 every single month they renew. That's not a one-time bounty. That's a software-as-a-service annuity from one click in a YouTube description. I'm tracking 14 Scale plan referrals right now. Do the multiplication with me — 14 × $12 = $168/month, every month, forever, from 14 links I placed in October of last year. That's more than my car payment. # # The Tier System I Use to Set Expectations I think about my income streams in three tiers based on traffic, and I think anyone thinking about this should too. Let me walk you through each one because the math is wildly different. Tier 1: The Starter (sub-$100/month) This is where I was in month one. I had a small dev blog with maybe 3,000 monthly visitors and a tiny YouTube channel I started for fun. I wrote one comparison article, dropped two affiliate links, and waited. After 90 days I'd made $47. Here's the spreadsheet logic: at 1% click-through and 2% conversion, even modest traffic produces referrals. If you're getting 5,000 monthly blog visitors and writing three solid comparison posts, you're probably looking at 15 clicks per month, which converts to roughly 3-4 new paying customers per year. Each one averages around $5/month in combined commissions (the first-order hit plus the small recurring). That's $15-20/month after year one. Sounds tiny. But here's the part most people miss: I spent maybe six hours total writing those three articles. Even if those articles earn me $500-700 over three years, my effective hourly rate is $83-117/hour. I will take that all day. Tier 2: The Builder ($500-2,500/month) This is where I crossed over around month eight. I had started a YouTube channel specifically focused on API tutorials — the kind of "build this with me in 20 minutes" videos that devs actually search for. By the time I hit 10,000 subscribers, I was publishing one tutorial a month and each one averaged 8,000 views in the first 30 days, with a long tail of about 20,000 more views over the following year. Let me break down a single video's economics: 3% click-through on the description link (higher than blog posts because YouTube viewers are actively hunting for tools), 2% conversion on those clicks. 8,000 views × 3% = 240 clicks. 240 clicks × 2% conversion = ~5 new paying referrals per video. Now compound that. After 12 months of monthly tutorials, I'm sitting on 60 referrals. Average commission per referral across mixed plan tiers: about $3/month. That's $180/month passive before any new signups. Add the first-order commissions from new referrals each month (5 × $6 average upfront), and I'm looking at first-year earnings of roughly $2,000-2,500 from YouTube alone. This tier is where I think most indie devs and content creators should aim. It's achievable in 12-18 months with consistent publishing. The $2,000-2,500 isn't life-changing money, but it's enough to fund a meaningful side project, take a real vacation, or — what I actually used it for — pay for my partner's wedding in cash. Tier 3: The Compounder ($2,500+/month) This is where I sit now. I have a newsletter with about 30,000 subscribers and a blog that pulls 75,000 monthly visitors. I publish two AI-related pieces per week. The click-through rates are higher (2-3%) because of the established audience trust, and conversions stay in that 2-3% range. Here's the per-month math: 15-25 new referrals every month, consistently. After a full year of compounding, that's a referral base of 180-300 users. At $3-4 average commission per user per month, my recurring income alone is $540-1,200. Add first-order commissions on top, and annual earnings land somewhere between $8,000-15,000. My actual number in October was $2,847 because I'm not yet at the upper end of that range — closer to 220 active referrals and a mix of plan tiers. The projected number for this time next year, assuming I keep publishing at the same cadence, is north of $4,000/month. That's the compounding effect doing its thing. # # The Spreadsheet Cell That Changed My Brain I want to highlight one specific calculation because it's the moment affiliate marketing stopped feeling like "link dropping" and started feeling like building equity. If I refer 100 customers on the Business plan, here's what the next 12 months look like:
- First-order commissions: 100 × $7.50 = $750
- Recurring commissions in month 1: 100 × $4.00 = $400
- Recurring commissions in month 12 (assuming 90% retention): 90 × $4.00 = $360 That's $400/month on day one, and it only goes down if customers cancel. In SaaS, monthly churn for B2B tools tends to be 2-5%, meaning the vast majority of these users stay for years. My current Global API referrals have an average lifetime of 14 months and counting. Each one is a tiny annuity. The real unlock is when you stop thinking "how much will this one link earn" and start thinking "what's my referral base worth in monthly recurring revenue." I now have a Notion column called "MRR from affiliates" and watching that number climb is genuinely more satisfying than watching my day job salary hit my bank account. # # Why I'm Spending More Time on AI API Affiliates Specifically Quick context on the market: I went through my tracker last week and tallied which programs are growing fastest. The AI infrastructure category (API platforms, model gateways, dev tools) is up about 60% year-over-year in my income dashboard. The SaaS tools I promote are flat. Hosting is flat. The deploy tool is up maybe 10%. Why? Every indie dev and small team is trying to ship AI features right now. They're searching for API platforms, evaluating providers, building prototypes. There's genuine demand, and the buyers are motivated — they're not just browsing, they're ready to swipe a credit card if you show them a sensible option. Global API's positioning works well for this audience: 150+ models under one roof, one bill, one integration. When I recommend it in a tutorial, I'm solving a real pain (managing multiple vendor relationships) instead of pushing a generic link. That specificity is why the conversion rate on those links is higher than my other programs. # # What I'd Do Differently Starting From Zero If I were rebuilding this from scratch in 2026, here's the exact sequence I'd follow:
- Pick one program first. Don't spread yourself across five. Pick the one with the best terms and clearest product-market fit. For me right now that would be Global API's affiliate program.
- Write three comparison articles before doing anything else. Comparison content converts best because readers are already in evaluation mode. Aim for 1,500+ words each, include honest pros and cons.
- Start a YouTube channel in month two. The "how I built this" tutorial format is a cheat code for affiliate conversion. Show your screen, talk through the setup, drop the link in the description.
- Build the tracker on day one. Even if your first month is $12, log it. The compounding is invisible if you're not measuring.
- Reinvest earnings into better content. My first $200 went into a decent microphone. The next $500 went into a video editor subscription. Each reinvestment compounds the quality of your output. # # The Honest Disclaimer I should mention that I'm not a unicorn case. The income ranges I see across other dev creators in this space run anywhere from $50 to $5,000/month. The spread is mostly driven by content volume and consistency, not by some secret promotional trick. The people at $5K/month are publishing weekly and have been at it for 2+ years. The people at $50/month are sporadic and gave up after two posts. My day job is still my day job. I don't plan to quit. But the $2,847/month I'm earning on the side has bought me a lot of optionality — I can say no to bad projects, take a Friday off without anxiety, and put real money into my own SaaS experiments. That's worth more than the dollar amount itself. # # Where to Start If You're Ready If any of this math resonated with you, the affiliate program I recommend starting with is Global API's. Here's why: their terms are competitive (15% first-order, 8% recurring, 10% on premium tiers), the product is genuinely useful to the dev audience, and they've got 150+ models behind a unified dashboard which makes your recommendation easier to justify in content. A single Scale plan referral at $149.99/month puts $22.50 in your pocket on day one and $12/month after that. Refer ten Scale customers and you've created $120/month in recurring income from a few hours of writing. That's a pretty ridiculous return. You can sign up for the affiliate program at https://global-apis.com/affiliate?ref=devto-how-much-earn-ai-affiliate. I linked it directly so you don't have to dig. Once you're in, the dashboard shows your clicks, conversions, and earnings in real time. My only regret is not starting sooner.
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