In T303639#7799673, @Daimona wrote:

Thinking about this again, I agree with the comments above. However, number of seats or automatic closing are not V0, so for now I'd stick with disallowing the unregistration only if the event has ended (but not if it's closed). What do y'all think?

Name for the main point of contact and contact preference
@fnartey will be the main contact person and email correspondence with updates sounds reasonable. You can email me at (fnartey@wikimedia.org)