I think many stay because of the hope of the *New System*. The fantasy they have been fed seems to have a strange mind hold. Their goal is the new system. Our goal was the new system. Everything was for the new system.
All the bully tactics keep you from researching and finding out the *truth*. However, if you want that fantasy, when the *truth* is presented to you, you will refute it as Satan....
My mother got CoC, read most of it, agreed that it had to be true, then decided that her fantasy of the new system is just too strong. She had to go back to Wonderland.