What I wonder is what the effect could be if Facebook or some other "social" company were to cut users' in to some of the ad revenue, e.g., as in somehow getting compensated for having your photo appear next to an ad for a company you "liked". I can imagine benefits, as well as strained trust, between the company and users -- but it seems to me that so far the users themselves have only played one part of the process when there may be a lot more to that.

But I haven't thought about this very in-depth yet, it's only crossed my mind once or twice reading these headlines. Can users, advertisers and "social" service providers interests overlap somewhere?