It's not clear what the limits are, from the article or really from OpenAI. The author only really knew that some combination of quantity and extent of material

It's not clear what the limits are, from the article or really from OpenAI. The author only really knew that some combination of quantity and extent of material was enough to trigger a warning, it could very well have been a handful of users pushing boundaries pretty far. NSFW is one thing, but chat can certainly go into NSFL territory, non-consensual roleplay, etc. I don't know if people here are being naive or dense, but merely "non-PC" content isn't going to trigger anything. I spent like a couple minutes setting up a roleplay where ChatGPT is happily advocating for Nazi ideology (and not even on the API; ChatGPT is generally more censorious than the API). I'm not going to try to hit the limits, but I literally don't think you can hit the limits with merely political speech. I don't know what the NSFW limits are, but I bet they are further than people here think. The vagueness absolutely makes stuff difficult, and the author hit a kind of all-or-nothing approach by going from no restrictions to using the moderation endpoint which is very strict. That could be improved.