IIRC ReactOs forbids you from contributing if you had access to the windows source code in some way shape or form.
Apparently copyright law only applies for humans, generative AI gets away with stealing because there is too much monetary interest involved in looking the other way.
I don't think the world really needs that. :)
To me that just sound like it will make ReactOS much more Windows-like. So it's probably a win for the project. \s