Was there really any doubt this day would come? I don't think so.. not with the business model they have been using from day 1. Not to mention the awesome fact you can spend $3.99 to get your product the next day!
http://feeds.wired.com/c/35185/f/661370/s/4862e25f/sc/21/l/0L0Swired0N0C20A150C0A70Chey0Elook0Eamazon0Eactually0Eturned0Eprofit0C/story01.htm