I stayed up until midnight last night to get the MDAS bookings for our cruise. At 11:59PM, they were not available to book. At midnight when I refreshed they were all listed as sold out. At first I thought perhaps they all went to concierge guests, but I kept checking periodically. They continued to show as sold out until sometime between 9:30 and 10:00 this morning, when they suddenly became available to book (which I did). So who knows if they will pop up at midnight for future cruises or whether people will just have to guess/keep checking.