JoinAvA was originally planning to have a group flight from PHX to PHL for this Open Mic Night. Everyone was informed and staffing was secured at ZAB. Then, on June 17, JoinAvA requested to change the group flight to be MIA to PHL. I asked ZMA and they said they would not be able to guarantee service for the event. I then informed JoinAvA, and asked if they would like to change the departure airport, but they did not. They knew staffing at MIA would likely not be available, yet they chose to fly it anyway.
I am happy to discuss this further via email. We look forward to working with JoinAvA for future events.