AAAAaa yes. Casinos, the world's most lawful type of business model there is. Banning them to use celebrity names would definitely 100% for sure make them stop using it all together. Stake was from Australia, I think, which means Kick is as well. But I doubt they are "based" there; like, a company headquarters, etc must be somewhere like the Bahamas or Curaçao or whatever, for tax and license reasons, I am sure. I have not checked, of course.
But aside from that, Kick will have a ton of famous people gambling, like drake for example, and Australia will not be able to stop it. Worst case? Casinos will come out and say "we did not pay him to play here; he wanted to play here", and that's it, nothing more is needed, and Australia can't do anything about it.
Why am I confused with this process? I saw licensed on the subject which means they are legally allow to operate but can't use celebrities, how does that make sense. If this were to be unlicensed bookmakers, that means they have every right to stop them and sue them for spreading them for their followers. If the gambling regulations have to worry about celebrities promoting bookmakers, they shouldn't have allow them operate in Australia.
We have different type of celebrities now days, there are football analysts, these people do sports for a living a have millions of followers, I don't think there is nothing wrong to promote a bookmakers for sports mode. Most of these celebrities don't even have ways to earn money, if the governments takes this out of their way, they will not have means to do any promotions again.