Okay, there are watermarks on AI stuff, interesting, not good but everyone else already talked about.

My question..how does it work? Is it robust? I remember that young me hid data in pixels of png with simple stegonagraphy and it was a fun little project..but brittle. How exactly does the fingerprinting survive jpeg compression? Is it repeate over and over the images or is it just one area? If that one is pure black by chance the jpeg algorhitmen would erase it all no?