CK uses a mobile phone/web app that was built for school reminders to announce their reservations being opened up. In the last run of TCs and the subsequent #77 NF Barlows, they went with a lottery system instead of reservations and used the school reminder setup to point people to ANOTHER third-party service which accepted email addresses for the lottery draws themselves. I'm assuming one of these systems crashed during the rush to sign up for the lotteries, meaning no more "lottery scrambles".
I haven't seen an indication that they are planning on going back to the first-reserved, first served system they use for most other GEC releases.
Hopefully clarification is forthcoming. You can't even respond through the school reminder system to ask a question such as this, so we're probably not going to find out until the day reservations are opened, lotteries are held, or knives themselves go up for sale.