Yes, and that is a problem when the money of the 'house' is not involved. I couldn't care less if Stunna plays his own game, but dooglus playing JD and I will refrain from visiting that site.
I have played a little Just-Dice in the past. I make a point of never playing from an account that isn't called "dooglus", so people can see it's me playing. Using a different name would feel wrong. And of course I never look at the server seed, since that would allow me to cheat.
I figure if I was dishonest I could use random other accounts and slowly bleed the site dry, so investors have to trust that I won't do that, or not invest.
My stats:
bets:1,614
wins:652
losses:962
luck:101.25%
wagered:36.32049978
(profit):0.89308763