I just opened a niche ebook store and im looking to get into a affiliate program that takes money only when someone through them makes a sale, i have my own check out and what not and also my own affiliate program but i still want to advertise with someone that does cpa type advertising and only charges when they make a sell. (paypal would be nice)
Yes, you have to use their buy buttons. They take their fee and the rest goes into your paypal account. But you also will have their affiliates (hopefully) promoting your site.