I was in Aquila after finishing Tartatus, and I accidentally tried to go to Cyclops Lane (I had no membership) and this showed up:
O: IT’S ON SALE. I’ve never seen this happen before. I decided to check the other parts of Wizard City that needed purchasing, and they were also all on sale.
So far, I think only Wizard City is on sale, because Krok and some other worlds I checked didn’t have a discounted price.