Based from our experience since 1997 joining many affiliate programs almost 95% of affiliate programs on the net are scams and never pay. They only promise you to pay for your work to create affiliate doorway pages, promote their site and advertised their site but they never pay and even they used tracking script like assoc trac etc, and you have got sales, they easily reverse the sales and cancel the commission with saying that this sales is fraud but they never let you know the customer for you to verify. Big names in affiliate industry like Marlon Sanders, Ken Evoy (Sitesell.com) used to be honest and respectables but lately becomes more like a scammer with many ways to hold, delay, change commission structures and reverse commission payments, so you better avoid those affiliate programs by them
http://Highyieldbiz.com/