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 too 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.
If I also run casino online then I wouldn't mine copying the template or UI of my casino and made some changes so it won't be the same it won't become an exact copy of the website design from the original casino but rather focus on other important things to do like making sure that the site is safe with good security measures, finding bugs/issues, having a good customer support if someone is having an issue and most of all, solving the problems as fast as possible not that I don't care about the design. In short, customer's satisfaction first since house edge always win. That's my opinion about it.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.