Correct. There's a "blind" tracking pixel at the checkout page that will usually catch the sale in a "last cookie wins" fashion. So on top of the advertisers, a

Correct. There's a "blind" tracking pixel at the checkout page that will usually catch the sale in a "last cookie wins" fashion. So on top of the advertisers, anyone actually facilitating the sale by advertising is ripped off by the coupon sites. It's a major pain for the industry - the only surefire way to protect yourself is to get rid of drop either affiliate marketing or coupon codes.