Any one can fund the NounsDAOV3Votes.sol contract, but it is presumably the DAO funding it to refund gas for voters. If contract ETH balance is insufficient, voters may not get refunded their gas when voting.
In the new NounsDaoV3Logic, all proposal thresholds are calculated using an adjusted total supply instead of the fixed nouns supply previously. This adjusted total supply represents the total supply of nouns minus nouns owed by DAO. If in any of the address the Nouns DAO mints/transfer nouns tokens, it could affect proposal thresholds by increasing/decreasing it respectfully, potentially preventing/allowing proposals to be created.
In NounsDAOForkEscrow.sol, any nouns tokens sent to the contract to be escrowed faces a potential risk of DAO closing escrow at anytime, essentially locking up the tokens and cannot be unescrowed, with the tokens only being able to be withdrawn by the DAO.
With the introduction of proposing proposals with other signers, it also gives the power to signers to cancel proposals at anytime without the need to consult proposer/other signers. This opens up the ability for any signers or even the proposer to invalidate votes simply by cancelling the proposal if they do not agree with the direction of the state that proposal is approaching (Defeated/Succeeded).
