I also thought the same "How do they stay open" with such overhead and seasonal sales. I thought the Shelbyville Rd. twisters was owned or partially owned by the son of the local Panera Bread Franchise owner and that they had anticipated similar expansion with the custard concept.
How much do you spend on dessert vs breakfast, lunch and dinner? That was an awfully expensive property to be supported by custard sales alone and I am suprised that they lasted this long. My two cents.