Heh, I've seen his posts before too; they're always pretty big and informative. That's what makes them eye-catching, and for those familiar with AI texts, they always raise suspicions. I've also checked a few of his posts before, but since I was checking them on public free resources, I didn't see any consistent results. Finding this account was obvious, but it took time.
My applause to @Ultegra134; feel free to add tags to your investigations; you're on my trust list, and I don't regret it for a minute.