There has been no statement either way, as far as I could find beyond them only using commercially available models, though given Alpöges employer, I'd be surprised if they didn't opt out. In any case, for such work, ZDR or self-hosting seem to be an absolute must now.
Unless OpenAI can show that training was permitted, this will erode the limited trust that many users have had in such toggles and may lead to further, uncomfortable inquiries.