Sometimes, I'll join a game because it has the number of players I prefer for that map. But then the host will change the max and if it's a busy time, those slots will get filled up quick and the game starts. Or they add in AI (because what's the point of manual setup when there's a bot, really). So I'm stuck in a game and have to give up my coins and ranking to leave. There should be a last minute confirmation from players.