3. The Lock Poker scandal
Lock Poker was one of the top poker sites in the United States (US) because it was one of the few active poker sites that were available after Black Friday, one of the darkest days in poker history. Although it enjoyed success during its initial phase, it coped with several scandals as the site cancelled the payouts of the players in 2012 before it finally closed down in 2015.

Players lost millions because the site denied processing their withdrawals, as per gamblingsites.com. This is considered to be one of the biggest scandals in poker history. Players lost millions because the site denied processing their withdrawals, as per gamblingsites.com. This may not be as big a scandal as Black Friday, but this still goes down as one of the biggest scandals in poker history.