You are not in YoloDice campaign (
spreedsheet) then why are you wearing their signature?
Expecting someone will think you are in the campaign and will not hesitate to lend you the money?
Exactly as you said it. It's an old strategy from scammers to put a signature from a well-known campaign in order to "verify" that will repay the loan.
In the case of OP though he must forget to remove it since his account is already ruined so he can't be in any good signature.
Not to mention that this account is probably sold from the original owner...