I'm curious if it's possible to make a profitable GPT Poker bot, I have seen a few GitHub repos but not experimented with it. Obviously legal/ethical concerns there aside. In my experience you see a lot of the same names when playing and they could be bots. But you can interact with people in the game by chat or "throwing" objects at them in the game like a horseshoe or cards. And when they react back maybe that's a sign they're not bots. Regardless you want to avoid playing with the good people and seek out the bad players aka fish so you can play against them instead. Table selection is key.
Bots mostly don't play fair. One strategy I've seen is having multiple bots play passively to minimize losses, unless at least 2 get placed in a single game. In that case the bots can share information bully the rest of the table by playing aggressively.
Given how awful LLM are at chess, I'd say GPT sucks at poker. Making a profitable bot using state of the art poker software, like stockfish for chess? That's already done.