Is this a new precedent, that "legal" hackers that operate in two countries can be forced to divulge their vulns?
there are many treaties on this. It gets complex, some countries will not turn criminals over if the death pentalty is would be used for example. However in general if you commit a crime you can't flee to a different country.
countries like north Korea and Russia are exceptions. Which is why malware so often comes from them. Anyone else and you are likely to be caught.
If I run an Internet-facing server, where is it deemed to be? Everywhere?