The new model: https://news.manifold.markets/p/exploring-cash-prizes-for-good-predictions

E.g. one idea is a sweepstakes market where you can bet on whether 1kg of gold will be worth > $1 tomorrow, at 99.99% YES odds, win it, and then convert all those mana into a cash price.

Another one is if you can simply sell off your mana in a first-party or third-party market.