Advertisement syndication is a simple method for application programmers and Web site designers to earn money from their products. They sign up for syndication programs with an on-line advertiser and create a link to an application running on the advertiser's server.

The advertiser uses this application to automatically provide different advertisements (normally in a graphic image format such as GIF or JPEG) to the requesting application or Web site.
Every time a new advertisement is downloaded and displayed to a user, the programmer or Web site designer earns a tiny amount of money, sometimes as little as $0.01. The more people that use the application or view the Web site, the more money the designer or programmer earns. Because millions of people use P2P clients, a successful programmer can quickly earn a significant amount of money!