Welcome to the world of
DVC. Benefits are always based on availability.
Can we buy Sorcerer APs right now? No. Why? They're not available.
Did everyone who wanted GotG DVC previews get a slot? No. Why? Limited availability.
If you read the fine print in your email about Moonlight Magic you'll see this (bolding mine):
Disney Vacation Club Moonlight Magic events are Membership Extras, and are incidental benefits –
these offers are subject to availability, change or termination and may require a fee. Membership Extras are only available with eligible ownership interests. Visit
http://disneyvacationclub.com/memextraspolicy for more information.
I hope that anyone who got a late queue number today can try again on 5/10. I understand the frustration but it's just like ADRs for high-demand restaurants and getting a boarding group for virtual attraction queues. There's not enough spots for everyone who wants them.