How about when the server is full, and a Knight or Rook level customer wishes to log on, BrainKing would automatically punt the Pawn who has been logged on the longest.

Give the Pawn a message like "Thank you for checking out our site, we hope you enjoyed our features. Unfortunately we are currently at maximum capacity and a paying member wishes to use the site. Please feel free to log on another time." (or something to that effect)

I feel that it might help motivate some Pawns to upgrade their membership and help keep current customers happier. By the way, BrainKing is a great site. Keep up the good fight!