Update: A Zoom spokesperson confirmed to Axios that the account had been closed “to comply with local law” and said it had now been re-activated.
“Just like any global company, we must comply with applicable laws in the jurisdictions where we operate. When a meeting is held across different countries, the participants within those countries are required to comply with their respective local laws. We aim to limit the actions we take to those necessary to comply with local law and continuously review and improve our process on these matters. We have reactivated the US-based account.”
— Zoom statement
Between the lines: This suggests Zoom closed the account due to concerns in China, which forbids free discussion of the 1989 Tiananmen pro-democracy movement.