For me, I'm completely against the DAO being in the LPs. Any place where the DAO competes with players and investors for rewards is a giant no. But that's not what this is about.
I still like this proposal but as I think more about it there is a potential problem. If things get tight for the DAO, its likely going to be during a time when the game isn't doing well. If they have to fund something with USDT, that's fine, but if they only have the DEC and have to dump a bunch on the market (or pay someone with it who dumps) when the game is weak, that could be bad. Just thinking out loud.