One thing we tried at DP was giving each player a UNIQUE card (like a soft PR ability). They could activate the card only once, and only during a Day phase. There were only 8 players that game (it was originally meant to be a Mini-Game), but it got over 1400 posts. If I can get about 23-25 players and arm each one with a very creative and useful card, the game thread will amass more than 3,000 posts. I'm sure of it.