

It’s more a trademark issue, which requires continued use (but that may still be legally satisfied even with a low active user base). If there is an active maintainer/owner, they probably could file a trademark suit.
Copyright in anything like code or content will outlive us all in Berne Convention countries. That protection is automatic, so the notice like you see there is not necessary, but it also indicates dates that begin the copyright clock, not the ending of it.

I mean, I agree we don’t want spying, but: a foreign government absolutely can use your data against you. Whether its creating a profile on you that could later be used against you when you enter that country, using it for statistical or targeted data for influence campaigns…there are a lot of ways.
China in particular has repeatedly deployed extra-territorial “police service stations” in at least the UK, Canada and the US to punish or harass those it’s identified as “Chinese” dissidents or sympathizers in other countries.