Kane began by selecting a game, like Triple Double Bonus Poker,
and playing it at the lowest denomination the machine allows, like
the $1.00 level. He kept playing, until he won a high payout, like
the $820 at the Silverton.
Then he’d immediately switch to a different game variation, like
straight “Draw Poker.” He’d play Draw Poker until he scored a win
of any amount at all. The point of this play was to get the
machine to offer a “double-up”, which lets the player put his
winnings up to simple high-card-wins draw. Through whatever twist
of code caused the bug, the appearance of the double-up
invitation was critical. Machines that didn’t have the option
enabled were immune.
Now when Kane returned to Triple Double Bonus Poker, he’d find his
previous $820 win was still showing. He could press the cash-out
button from this screen, and the machine would re-award the
jackpot. Better yet, it would re-calculate the win at the new
denomination level, giving him a hand-payout of $8,200.
Obviously a bug, but I can’t see how it’s a crime to take advantage of it.