Jackpot Arena is a tournament in which three players compete for a jackpot. To participate, each one has to pay an entrance fee in the form of tournament buy-in. After that, the size of the jackpot is calculated as the tournament buy-in multiplied by a random factor from 2 and higher. The game kicks off and goes on until two players are busted. The remaining player becomes a winner and takes the jackpot.
If you leave a Jackpot Arena tournament, you lose your remaining stack, just like in real poker tournaments.