I think you mean his wins, and I think they do affect the future; when the house loses 75% (or whatever it is now) of everyone's investment there's a chance that a large percentage of investors will lose faith and pull out their remaining coins.

Whether or not 1dice1 is cheating or playing for the house, people are going to worry that something's not right.  Some of them will divest, causing your bankroll to dwindle and making it increasingly difficult for the site to ever recover its losses.