“The key to the glitch was that under just the right circumstances, you could switch denomination levels retroactively. That meant you could play at 1 cent per credit for hours, losing pocket change, until you finally got a good hand — like four aces or a royal flush. Then you could change to 50 cents a credit and fool the machine into re-awarding your payout at the new, higher denomination.” The house always wins. Unless there’s a software glitch. Well, maybe the house wins even then. From Wired’s Kevin Poulsen: Finding a Video Poker bug made these guys rich — then Vegas made them pay.