I'm going to guess, since I was really looking for the answer myself. Promotion of other websites either owned by the developer(s) of the forum and/or spammers. Maybe they're one and the same? On...
There are many bodybuilding forums on the inter webs. I would believe the most obvious one is forum.bodybuildingdotcom. This forum seems to have just about everything bodybuilding on it.
The Internet is the best forum for marketing that has ever come along because virtually anyone can sell products and services to a global market within a relatively short period of time. Web design...