Actually I think he increases his chances of getting paid by your own reasoning. Who says it has to be paid by Romney? The 1 million Bit Coins could be paid by anyone with a desire to make him look guilty, but not something that might cause an issue with the election (like the release of stolen tax documents of the candidate). If the blackmail is paid the day before the 28th, everyone will assume Romney was hiding something, even if he wasn't.