I have a few years old account. One day they just blocked be out and rudely demanded a phone number.
At the time I had TOTP based 2FA since forever.
Fine, I got myself a burner number (not sharing a real number with creeps and bullies), account tot unblocked. I kept using it.
A week later I deleted a phone number form my account (marked as optional after all), and the account got immediately, immediately blocked, after I saved the changes.
However at this point, as a GrapheneOS user if I couldn't use it for any reason I'll go to iOS (even though I used it for a couple of years and I've been fed up).
:)
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