I’ve been to the last three RR Events and have never seen an invite list or call list or anything other than a general post somewhere in POA (no clue which forum since I just use “new”) discussing what April weekend is going to be best. When it popped up, I replied and went. Once I said I was coming, I got added to a chat where personal and other info could be exchanged.The event was fine. Frankly, it was a "locals" event that they graciously extended an open invite to all, so it's to be expected that a non local wouldn't fit in as well. I don't recall the name of the airport now, but the event was for the locals to grieve over its imminent closing.
It was after the event when I asked multiple times to be added to the list of people notified for future events and was not added, that gave me a feeling I wasn't going to be missed.
eMan has several times has several times explained how it’s working now. If you really want to attend, just look for a post on RR 2025 or Gaston’s or whatever and reply. No asking for permission, hunting a call, searching thru your Spam folder etc. 6PC even extended an invite for next year but look for the RR 2025 post early next year.