At one locals casino, I ran into a double deck game that featured a Bust bet. If the dealer's third card busts the hand, you can win even money if you place your bet before the dealer starts hitting hands. The maximum bet is $50.
Unless I misunderstood what the dealer said about this bet, there should be an advantage when the count is high, though you'd have to adjust for Aces not being + cards.
What am I missing about this proposition? And if it is playable, what should the adjusted count be?