sneaky: Contrary to what you wrote, I believe people were able to log in and decline their slots already. So those 30 slots were simply declined winnings. There aren't any there now. I saw those permits, too, leading up to today.

My guess is that some large groups got many people in their group to apply for the lottery, and more than one of them won slots in the lottery. So all but one logged on and declined their slots, resulting in 30 slots showing up available.