There are a lot of families that cannot afford the usual price and this is a big deal to them. The Nandos deal may not have been as well publicized, but also Mandarin is all you can eat.
People here arw commenting from having spent time waiting in the line or seeing it at some time.
As I mentioned previously, at Yonge and Eglinton people lined up the night before and went up Yonge and over to Duplex. There was probably a 6 hour wait.