Affiliate programs are interesting. The idea is to reduce the customer acquisition cost by paying small sites to promote your own site and pay them on a cost per action basis. Examples of this are www.flysiden.no , www.flybilligst.com , www.bestepriser.com and more. They present existing information in a new way and earn money by generating sales for the companies that run the affiliate programs. A good place to learn more about affiliate programs is: http://money.howstuffworks.com/affiliate-program.htm