A free membership allows a player to play only 20 games simultaneously and when this limit is reached, new games cannot be started until the number drops below 20.
Higher membership levels solve this problem in the following way:
(hide) In the mood for a quick game that is guaranteed to finish within 2 hours? Create a new game of your preference, select the Time for game and set Time to 0 days / 1 hour, Bonus to 0 days / 0 hours and Limit to 0 days / 1 hours. (TeamBundy) (show all tips)