Jackpot PKOs are having a moment.

These tournaments, with origins on Winamax as Space KO, have gone global thanks to GGPoker’s Ocean KO. The premise is simple: every knockout pays out a randomized bounty, which can be a fraction of the original or up to 400 times the buy-in.

“The result is a tournament where huge prizes can be won at any point, by any player. Because the multipliers are randomized, a jackpot PKO can pay out far more than the total buy-in.”