Everyone copy Stake.com will not get clients this way if you are not unique
there is nothing wrong with copying stakes because there are many new gambling sites that do that (copy UI, UX and systems against old gambling sites that already have a reputation)
the important thing that actually has to be done by the development team from this site is promotion, because it really has a big impact on the branding of a gambling site
actually a lot of new casinos are copying old casinos but not overall it even looks like there are additional pages or something new is added there, after all that's not an important point to enliven this site what's important is the promotion carried out in this forum
It is understandable that we can see some similarities of these casinos because most don't start from scratch.
I am sure even the top casinos right now got their idea from existing casinos. They only make modifications according to the capability of their dev team.
Remember, the regular casino games such as dice, roulette, crash and others have been the regular games of most casinos.
They only vary how the features are presented to the players, they tweak it according to the casino's theme, color, presentation and others.
I have no problem with copying, so long they are not screwing their players and they are continuously improving their services.