Hi JP, I can answer the first 2 of those, leaving the last to Des/Tom.
1. The buy-in route via Coral with be closed at 8pm 31st March. This is to allow us enough time to get the cash to the casino. After that point you can still reserve via EventBrite, or buy-in at the casino directly.
2. If you won a seat via a satellite you have to use it (or sell it via the seat exchange). If you bought in, then [MODIFIED] after the Coral holding tanks close you"ll need to use the seat exchange as per standard APAT events [MODIFIED]