My idea is this.
Admins pick 30 tickets from a box of tickets. Each player contributes 5 tickets and if they are not a gst winner, they contribute 10. If the player is a staff or a someone notable for big achievements(gfx, towering, PK, BK), then that player contributes 5 tickets. And so, if you get picked, you get banned forever. Literally IP ban. Even if you don't wanna participate, each player auto-participates in either 5 or 10 tickets. And this would happen on the 1st of every month.
Edit: The people that get chosen do 20 events until there is a sole winner that is FOREVER exempt from this punishment. The events will consist both of teamwork and individual play. Every event won grants the player (or players if team play) ONE point.