I have 2 large membership sites and want to place 2 ads at the bottom of each page to generate some extra money. We currently have adsense at the top and make a little money but if I pay someone to change the pages and layout what would make more money? I'm thinking amazon, affiliate or clickbank. Just wondering which you had better luck with. I'm in the pet business and alot of affiliate programs do not have cookies that last more then 24 hrs.