DavidBowiesLuckyTennisBall Nice bit of nostalgia, but I'm surprised by the last choice. If he wanted to explore social media as a game, why not Facebook and stuff like FarmVille?
Aelric Penetration and competition, really. The twitter feuds and the fact that your grandmother still checks her feed every day. Facebook itself isn't competitive, more a glorified e-mail (in my experience, anyway) and farmville is, believe it or not, niche.