Psuedo-Intrade. Use a fake currency, but otherwise keep it basically identical. Players can use their not-money to buy worthless-but-pretty trophies and whatnot for their Throne Rooms of Rationality. Probably include some occasional free money to keep the game above zero-sum, which could be discouraging (i.e. create bots and give them free money to place on bad bets).
Psuedo-Intrade. Use a fake currency, but otherwise keep it basically identical. Players can use their not-money to buy worthless-but-pretty trophies and whatnot for their Throne Rooms of Rationality. Probably include some occasional free money to keep the game above zero-sum, which could be discouraging (i.e. create bots and give them free money to place on bad bets).