Watermarks are garbage because they may embed account id, IP address and deanonimize you. That's why we should be using open-weights LLM whenever possible.

I don’t disagree about open weights (though the enabling aspect there is actually open source inference, right?)

But it feels to me like you would need a hell of a lot of text to bury even a simple account ID. The nudges they are talking about are of the order of a handful of bits over several hundred words, I think?

This is the first post I've seen mention it. How traceable are the embedded codes?

There was an earlier instance of this here: https://news.ycombinator.com/item?id=48734373