Affiliate Marketing
Affiliate marketing is a performance-based channel where external partners promote a product and earn a commission for each sale or qualified action they generate. Compensation is tied to results, not effort.
Key takeaways
- The commission model determines which partners apply, so it selects the channel's quality.
- Last-click attribution overpays partners sitting closest to checkout, often the least incremental.
- Paying on a scored qualification gate prices traffic by the quality delivered.
- Brand-term bidding rules belong in the contract before the first partner is approved.
- Partner concentration is a commercial risk: two large partners will set your terms.
In depth
Affiliate marketing runs on a tracked link and an attribution rule. A partner publishes a unique URL, a click writes an identifier, and when a conversion happens inside the attribution window the partner earns whatever the commission model specifies. The partner is a business with its own audience and its own economics, not a customer passing on a recommendation, so it will optimise for whatever your rules pay. The rules are therefore the product design of the channel.
The commission model decides which partners show up. Cost-per-sale shifts risk entirely to the partner, so only those confident in their audience participate, and volume stays low. Cost-per-lead attracts far more partners and imports their quality problems along with the volume. Revenue share aligns interests over time but is slow to pay and hard to pitch. Last-click attribution compounds this, because it rewards whoever appears closest to the purchase, which is often the least incremental part of the journey.
Running the channel is recruitment plus policing. You approve partners individually, write terms that forbid bidding on your brand terms and using your creative in misleading ways, and review new traffic sources before the first payout clears. A scored quiz funnel gives you a payment gate that does not depend on trust: send affiliate traffic into the scorecard and pay only on leads that reach a defined tier, which prices the traffic by the quality it actually delivers.
The unresolved problem is incrementality. A meaningful share of affiliate conversions would have happened without the partner, particularly where browser extensions insert a coupon click moments before checkout and claim the sale. Paying commission on those is a rebate dressed up as acquisition. The channel is also weak where the product needs explanation, since partners optimise for click-through rather than comprehension. And concentration is a standing risk: if two partners carry most of the volume, they set your terms.
Example in practice
How to measure it
Report per partner rather than per channel, since averages across a partner roster are meaningless. For each one, track conversion rate from click to payable event, the quality of what arrives, and commission paid divided by margin generated. Partners with identical volume routinely differ by an order of magnitude on the last of these, and the roster is where the decisions actually live.
For incrementality, the only reliable read comes from withholding. Pause a partner group in one region, hold everything else steady, and watch total conversions rather than the attributed line. If total volume barely moves, the commissions were funding sales you already had. Also watch the share of affiliate conversions occurring within minutes of the click, since a very short click-to-conversion time usually signals checkout interception.
Common mistakes
The classic error is paying on clicks or raw leads without a quality gate. That single choice invites incentivised traffic, coupon arbitrage and lead forms filled by people who wanted the sweepstake, and by the time the CRM shows it you have paid. Move the payable event to something the partner cannot fake alone, such as a completed assessment or a verified opportunity, before opening recruitment.
The second is treating affiliate revenue as incremental by default. Teams report the channel's attributed sales next to its commission cost, conclude the return is excellent, and never test what happens without it. Run a holdout: suspend a partner or a partner category in one market for a few weeks and compare total sales, not attributed sales. The gap between the two numbers is the honest measure.
Frequently asked questions
How is affiliate marketing different from a referral program?
Affiliate marketing pays external partners or publishers a commission to promote a product they may not personally use. A referral program rewards existing customers for recommending a product they already use, usually with credits or perks rather than commissions.
What commission models are common in affiliate marketing?
The most common are cost-per-sale, cost-per-lead, and revenue share. The right model depends on your margins and how reliably you can attribute and qualify the conversions partners drive.
How do I keep affiliate-sourced leads high quality?
Pay commissions on qualified actions rather than clicks or raw signups, and route affiliate traffic through a scoring step like a quiz. Auditing traffic sources regularly prevents incentivized or fraudulent leads from inflating payouts.
What is the difference between affiliate marketing and referral marketing?
The relationship. An affiliate is an external partner promoting your product for commission and has no obligation to have used it; a referrer is a customer passing on a personal experience. That changes the trust the recipient extends and the incentives the promoter faces. Affiliate scales with partner recruitment, referral scales only with your customer base.
Which commission model should I choose?
Cost-per-sale or a quality-gated cost-per-lead for most B2B products, because both push the risk of bad traffic onto the partner. Plain cost-per-lead only works if you can verify lead quality automatically and refuse payment on failures. Revenue share suits subscription products with high retention, where partners are willing to wait for a larger total payout.
Should I use an affiliate network or run the program myself?
A network gives you reach, ready tracking and a dispute process, in exchange for a fee and less control over who joins. Running it yourself is cheaper per conversion and lets you approve every partner, but you own the tracking, the payouts and the fraud detection. Most teams start on a network and bring the largest partners in-house later.
How do I stop affiliates bidding on my brand name?
Prohibit it explicitly in the terms, name the exact keyword patterns covered, and state the penalty. Then monitor, because a rule nobody checks is not a rule. Brand bidding is worth blocking specifically: the partner intercepts people already searching for you and charges commission on a sale that needed no promotion at all.
How many affiliates do I need?
Fewer good ones beat many indifferent ones, and most rosters concentrate heavily regardless of size. Recruit for audience overlap rather than headcount: a handful of partners whose readers match your buyer will outperform a hundred generic coupon sites. Watch concentration, though, because a roster where two partners drive most volume gives them leverage over your terms.
Does affiliate marketing work for B2B?
It works where partners already hold the attention of your buyer, such as niche newsletters, consultants and industry communities, and works badly as an open-signup program. B2B cycles are long, so cost-per-sale is unattractive to partners and a quality-gated lead payment is usually the workable compromise. Expect a small roster and a long recruitment effort.