@kodingwarriorJaeyeol Lee unfortunately currently majority of people don't have fedi accounts. They need to be able to RSVP with e-mail address only. This is already handled in Mobilizon, but it is impossible to message the attendees afterwards. Notifications via Fedi or Matrix would be of course preferred if attendee has an account.
@cos That's right. I will support Anonymous RSVP via email address someday.