Social networking holds the promise of being the next biggest marketing arena in town. However, the rules are far different on social networks like Facebook, MySpace, and Twitter for marketers than they are for conventional formats like television ads or direct marketing campaigns. A more subtle approach is required because of the policy that many of the social networks do not allow direct solicitation of their members. Even so, you can see that making money online on a place like Facebook can be done, just not as directly as with other types of revenue-making sites.