The fact that this is even a question is troublnig to me.
Why would there even be a reason to think that a book would have a problem with someone unloading on one game and then cashing out? What rule stipulates that you have to have your $ in an account for X amount of time and place Y number of bets with Z rollover requirements (bonuses notwithstanding).
Really, I don't understand why this should be an issue at all. I imagine situations like Joey's occur all the time during football season...someone deposits Sunday morning, and after a good run in the afternoon and MNF, cashes out not 36 hours after the initial deposit with a 200% or 300% return. Are you telling me there would be books that would prevent a player from cashing out in such a situation? What grounds do they stand on?