Coupon and deal sites: incremental growth or margin skim?

Coupon and cashback partners sit at the last step before checkout, so they get credit for demand other channels created. Test true incrementality with a holdout before you pay them like content partners.

Coupon, cashback, and deal partners sit at the very last step before checkout — exactly why they get blamed for taking credit for sales they didn't create, and exactly why some of them genuinely do.

Coupon and cashback partners convert well because a shopper searching for a discount right before checkout is already close to buying. That's also why to doubt the credit they claim: last-click hands the win to whoever sits at checkout for demand your ads, SEO, or email already created.

AI can read your order data and flag the incrementality signals; a holdout test in your platform is what proves it.

In this lesson

Fastest path: one prompt, end to end
Or do it in 4 steps
Worked example: reading a coupon holdout

What you'll learn

Start from the incrementality question
Keep code hygiene tight
Run a true holdout
Pay by incrementality, don't ban