Nothingness:
you say:
here is the dangerous part with vacations. many members get a lot of vacation time and set it on auto vacation they can literally be away from the game for 2 -3 weeks without a move and not time out!

I think this is not a big problem, because most slow players have hundreds of games running. With a fast time-limit, they will find our League game soon in the top of their list and they will become faster.

I never found a paid member not connecting for weeks.