What's the difference between affiliate commissions and fixed-fee customer acquisition?
Affiliate commissions pay a percentage of every sale, so costs scale with your success — you pay more exactly when you're making more. Fixed-fee acquisition costs a predictable amount regardless of volume, so every sale beyond breakeven is pure upside. Affiliates win when volume is low and unpredictable; fixed fees win when volume is growing and steady.
The core difference is who bears the risk. With affiliate commissions, the partner takes the risk of driving zero sales — you pay nothing until something converts. With fixed fees, you take the risk: you pay the fee whether or not the channel performs. The price of shifting risk to partners is that your costs grow in lockstep with revenue forever.
Run the math. Suppose an affiliate partner drives $10,000/month in attributed sales at a 15% commission: you pay $1,500/month. If that partner scales to $40,000/month, you pay $6,000 — for the same ongoing work. A fixed-fee alternative at $300/month costs $300 at every volume level. The crossover is easy to compute: fixed fee ÷ commission rate = the monthly attributed revenue where they cost the same. At $300/month and 15%, that's $2,000/month — past that, the affiliate model is the more expensive one.
So when does each win? Affiliate/revenue-share models win when a channel is unproven: you don't know if it works yet, volume is low and spiky, and you'd rather pay a premium on a few sales than commit budget to a channel that might flop. They're also sensible for genuinely incremental, high-effort sales work — a partner actively closing wholesale accounts, for instance.
Fixed fees win when the channel is proven and scaling. Once you know a channel converts, every marginal dollar above the fee is yours, and the partner's incentives are decoupled from your margin — which removes the quiet tension where partners push for bigger discounts or broader attribution windows to inflate their cut. Budgeting becomes trivial: one line item, same every month.
The scaling implication is the one merchants miss. At $5,000/month in partner-attributed sales, a 15% commission is $750 — noticeable but fine. At $100,000/month, it's $15,000/month for relationships that mostly run themselves. Audit your percentage-based costs quarterly, and convert your best performers to flat fees or tiered retainers before the math gets embarrassing.
GetNoCut is a genuine example of the fixed-fee model, applied to upsells. It charges a flat $24/month and takes 0% of the upsell revenue it generates. For comparison, a hypothetical revenue-share upsell app taking, say, 10% of upsell revenue (hypothetical figure, not any real competitor's pricing) would cost $100/month on $1,000 of upsell sales and $500/month on $5,000 — the exact scaling tax this article describes. With GetNoCut, the cost stays $24 whether the upsell adds $200 or $20,000 a month, so the upside of growing order value stays with the merchant.