I remember seeing a discussion about it and I also remember reading that this type of chess gambling could become a cheater's den, what I mean about it is that people will open two games, one with another person and the other is with AI and whatever move their opponent(the person) makes they'll copy it and use it against the AI and whatever move the AI made against it will be used against their opponent. basically, their opponent will be fighting against an AI.
There's a way to detect if someone's using an AI when they're playing chess, if you play at Chess.com, they have a system I think that can detect if a third-party software or the use of an AI was used to cheat on that match, you can always report the match so that someone check on it to see if someone did cheat on that particular match. As much as we think that it's impossible to implement this, I think that this can work but the person that will create this needs to have a lot of people that will check for cheaters and even a system to check for one before they can deploy.