I tried scanning a few of his posts, some showed a few mixed results where the detector wasn't entirely sure if it was AI written, but I didn't come with anything solid. I agree that his posts look sketchy, but that alone isn't valid evidence to accuse of AI. Perhaps he's using a humanizer or he's mixing AI with human written text. Unfortunately Originality doesn't provide free credits anymore, and I have no credits left on GoWinston either, so at the moment, I can't check with a more sophisticated detector.