Active players are those who have signed up and you are allowing them to play your game. Players may only be deactivated by the organizer.* However, be aware, since the organizer controls the ability to share the game code with all potential players, inactive players and active players both count towards the total number of players for your subscription.
* Organizers may choose to deactivate a player for many reasons including ineligibility, abusing game privileges or poor gamesmanship, etc.