I am wondering why I have not received a rating yet in some games. For instance, Five-in-Line, I have won 3 games so far but I am still unrated for that game. I know that they were rated games because I did not check off "Unrated" when I created the game, and also in the win message it showed my opponents' ratings being adjusted, but I was still shown as "Unrated". Why? Do I have to win or at least complete a certain number of games of a given type before I receive a rating in that game?