> The comment you initially responded to clearly stated specific instances that will trigger the phone number requirement

And I'm saying that I've personally been (as far as I can tell) in some of the situations described without encountering such requirement, therefore "will" is hyperbolic.

It especially doesn't make sense to me that there would be a flag for "joining too many servers" because they put a hard cap on that anyway. And indeed, the support article says that this triggers for joining too many servers in a short period of time.