I have set all options to yes so you either need a pass or pay 1 credit. I tested this on the Tetris game where 1 user already is 1st (and got the jackpot). I then just quickly lost and ended 2nd. I didn't loose a credit. I also didn't buy a pass.
Also some of the jackpots have 10 credits in them but the jackpot column on the main arcade page is empty. What gives?
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