BetRivers Poker will run its first mystery bounty tournament on Wednesday, November 4, according to the source report. The event is open to players in Pennsylvania, Michigan, Delaware, and West Virginia.

The source says that in Delaware and West Virginia, where BetRivers is the only regulated online poker room, this is the first time the format has been available online.

Under the format, knockouts pay nothing until the tournament reaches the money. After that, eliminating a player wins a bounty whose value stays hidden until the hand ends. The report says BetRivers built animations so the prize appears on screen when a knockout happens.

The report says mystery bounties first appeared in live poker in 2021 and have since spread to nearly a dozen online networks worldwide.

The format was first scheduled to debut during BetRivers Poker's second-anniversary week, which ran until November 1 with promotions, giveaways, and daily Super Splash pots for cash game players. The first event was held a few days later. The source says BetRivers Poker went live in Pennsylvania on October 31, 2024.

Rush Street Interactive built the platform in partnership with Phil Galfond, using poker software it acquired from him in 2022. The source says Rush Street Inter