I am working on a website which will advertise food establishments and am trying to figure out a way to monitize visitors. I am investigating charging for logo impressions, click-thrus to the website of the establishment, and possibly asking for a small percentage of the sale of a gift-certificate or any sale made if it comes through my site. I know this is done -- but don't know how it is done. I am not concerned about getting traffic to the site - just want to be able to make money from that traffic. Is there a program that I can buy or integrate that tracks all this so that an establishment can see how much activity they receive and allows me to charge and collect $$ ? Any info is appreciated.