Meta accounts only require an email address. There is no real name requirement, which they explicitly state in their help page[1] so this isn't a violation of the TOS.
[1] https://www.meta.com/help/accounts/set-up-meta-account/, see "Setting up your Meta account with email" section.
Eh. No.
Before these "drivers" had to be signed it was common for various graphics tweak tools to provide a method for building your own custom INF to "overclock" a monitor that only officially supported 60 Hz or whatever.
VR headsets that don't contain their own processing on the other hand do in fact work like a normal monitor. Usually they'll go in to a "direct mode" that does not appear as a monitor when their drivers are installed for both performance and convenience reasons, but they can be configured to just appear as yet another monitor.