JLH, without looking at the thread, I'm going to say, "Yes" people make (and can make) money with C2 on the appstore.
Just because C2 is easy to use and very visual doesn't mean that it's not an IDE. Technically, C2 is a gaming RAD IDE (rapid application development interface development environment). It is probably best suited to rapidly deploying prototypes, but is entirely capable of many types of software with their quality being limited only by the person making them.
With that said, C2 games are still games. If you release a game and it tanks, it is not C2s fault. If you release a game that sells well, it also is not a direct cause of C2. It's yours.