I feel like criticism of what is essentially a pyramid scheme is fair game. I have no idea why the instructors buy into it though. As far as I'm aware it depends on the place. Ivery read accounts that some people have left places after hating it. Everyone who is still "in" seems to be happy enough. Does just make it sound more cultish though doesn't it? I'vr also read rumours that people sign NDA's if they leave or something like that. Might just be a joke though.