As a rook, you already get 30 vacation days - that 1 month! (Add weekends, you already could stay away for about 2 months without playing a game)

If you trully have an emergancy that you may time out on a game, then 1 vacation day probable would not matter to you that much.

Also, possible make it an option where it will not take automatic vacation days for you in case a person does want to time out.

... And if it is something you think you might do often, then I would suggest that you are already playing games with too little time limit, and you should play some with longer time limits.