I actually asked "Eddie" from Stake.com during his weekly stream about the "friend" that opened a very similar casino to Stake.com and he said "not that I recall" ....but he also said that they are not to worried about sites copying their concept and that it was actually flattering that other people were doing this. (I guess, if you are printing money like them, you would not mind a lot if people copied you)

There are not a lot of big casino software developers out there, so I figure some people just buy a white label casino template from these guys and they just change the color scheme a little to fire up a new casino.