Seems like a good time to remind everyone just a few months ago he took two active usernames from their users without warning. Both @x and @music were in use and taken by Musk with no warning and no recompense.
At this rate I see it as completely possible that someone buys one, and the first time they don't update within whatever Musk feels like is "too long" that day, he takes it back with no warning.
I wonder if Mozilla would've benefitted if something like Hello was still around when the pandemic hit. Hello was a Firefox feature that made video chatting easy. You just needed to click the link.