It’s essentially, “I will show you how to achieve this desired result, but first, you have to do this.”
The desired results they promote are often played off of our emotional and psychological wants such as money, freedom, status, wealth, prosperity, etc.
And in order to promote a false sense of credibility on their topic, they flaunt their wealth and material possessions such as a mansion, sports car, fake profit numbers on a screen, etc.
Fake gurus are basically the modern day snake oil salesmen.