AP holders got emails as well. It went alphabetically through the system. Fiance got his at like 9 am and mine came in around 10:30 so that makes the most since as he is an H and I'm a W.
It was nice though that now that
MDE tracks all this they were able to release a link that works publicly. I tried for the sake of research to get a 2nd time slot after my fiance grabbed ours and the system said Opps please adjust your party as there are members who are either not AP holders or already have reservations for this event. So I would not have been able to book a 2nd slot.