Games = Clans. Yes, there is a ton of players that casually play your latest AAA games, but they would never use this, or any other service.

Me on the other hand would LOVE to have one place where i could have all my team mates on one place, right now when we need to train i send the email to one half of the team and FB messages to other.

Maybe you should try to fix that problem instead of creating FB like wall.