An online video game has the technical capability for a large number of players to participate, as long as a game administrator works to ensure constant functionality of the game. Adding more players deprives no other participants of the entertainment services provided by the online game. It has been easy, however, to set up a system for excluding participation by anyone who fails to contribute $5 per month to a fund that ensures covering extra expenses generated by that player's participation. Is this game a public good?