PokerStars has started to freeze the accounts of high stakes players in a bid to distinguish between human players and bots, as outlined by Eric Hollreiser in a Nov 1, 2015 press release.

Jason Mo has had his account locked by PokerStars. The six figure sum is significant.

anyone else get there pokerstars account locked today?

— Jason Mo (@cuntycakes123) January 16, 2016