The theory is that if you pass, it never even tries to charge your card. If you put in correct credit card info AND you fail, it will actually take your money and register you for another attempt.
You messed up the trick. If you pass, it won't even attempt to charge your card. Everyone can get to step 2/3. If you card is declined you supposedly failed.
I thought his review was good but overpriced. If your predictors are good (good grades on school exams, high HESI, etc.) or the cost of attending his class will be a large financial burden, I don't think it's worth it.