Email requirements for registration are set per-instance. Beyond that, it’s my understanding that only a user’s existence is shared across instances, in order to attach you to your content. Your registration details stay on the instance you belong to.
Definitely this. If you’re absolutely sure you can’t change config on the router, then you just treat it like a modem. Let it serve up one, single DHCP lease to your own router and run your network off of that.
Also probably tightly-related to the OGL 2.0 controversy, which peaked like a month or two before the movie.
Definitely a result of recency bias here, but in a couple of scenes in Tears of the Kingdom, Ganondorf is flanked by two female Gerudo with unique outfits. If you translate the Hylian text on these outfits, they say Koume and Koutake.