To protect investors, the most a single player can win in one game is 0.75 % of the bankroll, in line with the Kelly criterion. If a player were to win more than that, he will be forced to cash out. In addition, if all players in a game combined would win more than 1.5 % of the bankroll, they are also forced to cash out.
If 0.75% is the kelly, are you not worried that double that might be too high? The bankroll just lost over 200 btc to a player running 2 accounts to repeatedly hit that combined 1.5%.