Submitted by jayjonah8, also found by cccz, cmichel, Dravee, gzeon, hyh, IllIllI, leastwood, NoamYakov, and Omik
In BribeVault.sol the transferBribes() function uses token.transfer() instead of token.safeTransfer.
Tokens that dont correctly implement the latest EIP20 spec, like USDT, will be unusable in the protocol as they revert the transaction because of the missing return value.  The fact that the SafeERC20.sol library is imported at the top of the BribeVault.sol implies that safeTransfer should be being used but may have been forgotten.
BribeVault.sol#L296
Its recommended to use OpenZeppelins SafeERC20 versions with the safeTransfer and safeTransferFrom functions that handle the return value check as well as non-standard-compliant tokens.
kphed (Redacted Cartel) confirmed and commented:
Alex the Entreprenerd (judge) decreased severity to Medium and commented:
