So just what is clear, your bank account?
They use a pyramid structure—you pay to learn a little bit, then you pay more to learn a little more, etc.
I am sure the definition of “clear” changes multiple times.
Scientology is a word salad—brainwashing through NLP type tactics (https://en.wikipedia.org/wiki/Neuro-linguistic_programming). Then they use social pressure tactics to lock you in to their world.
The Leah Remini series (noted elsewhere in this thread) is excellent.