An IRC server or even a mailing list seems far better suited to the purpose than a notoriously closed and proprietary platform.
Does it currently? I have a couple Discord accounts that never got tied to a phone number and can still use them.
Telegram on the other hand does that, I've never managed to get my own account for it without a phone number... and all the anonymous (pay for temp number) end up giving you a shared "account" that anyone can take from you if they get attribued the same number (and they will).
I have no skin in this game, but I get the general line of thought.