On April 15, 2011, the U.S. Attorney's Office for the Southern District of New York seized and shut down Pokerstars and several of its competitors' sites, alleging that the sites were violating federal bank fraud and money laundering laws.

Re: Pokerstars allowed/prohibited\n\n You don't need to do anything. PokerTracker 4 complies with PokerStars terms of service and where necessary some functionality is limited when playing there such as the importing of observed hands and PokerStars rules on the coloring of HUD statistics.