I've entered a few contests that almost always seem to link back to Facebook in some way - you either have to log on to the sponsor's page and like them or something similar to complete your entry process. Social media sites are a godsend of free advertising for businesses and they are taking full advantage of it. Lord help me when everything goes to Twitter, Lynkdin (or whatever it's called) and all the others that are escaping my brain right now ... I've resisted them for the most part because to me they are way more annoying than Facebook. At least on Facebook I have free games to play and have met some really great people that I have played with for several years. I don't post personal stuff on there at all, maybe post a picture or tell a friend happy borthday once in a while.