But what happens if there's a sudden influx of new users (unlikely but possible) and the upper divisions get all filled up? The extra space is needed. There's other ways to remove frivolous game calculations... like say, doing a simple coin toss to decides any and all games in divisions that have no active managers. That way the division can still be there in case of a new user influx emergency, and the games don't have to cause a strain on the server...