Reason for accountings: Reducing extended free open use of expensive GPU resources.

iOS: Sign in with Apple gives you ability to use a privacy email address. You can also use many of the other available privacy email services out there, like Proton or Guerrilla Mail.

Side note: I actually did a show about Privacy Email Tips last week for Freedom Tech Weekend. Summary, lots of ways to hide your email identity. https://www.youtube.com/watch?v=VnEZuPsLzMw