They don't actually refer anyone (usually you don't look for coupons before you're at the checkout window), but in order to view a coupon you need to click a li

They don't actually refer anyone (usually you don't look for coupons before you're at the checkout window), but in order to view a coupon you need to click a link that gives you the RetailMeNot referrer cookie, giving RetailMeNot a cut for doing basically nothing.