I'd like to join their signature bounty; but account is required to do so

BTW what are conditions of withdrawals in bustadice? Any kind of verification, KYC AML or so?
Bustadice doesn't require KYC when you're about to withdraw your funds. Mininum withdrawal is just 100 bits and fees varies depending on hows network the situation.
See it for yourself, it's easy to use and user friendly.