I know that secret very well.
I was grown up in a environment were making money was top priority, and the only goal was making money in smart ways. I reached my climax when i was 19 and saw the differences in people in the ways of making money.
I learned that what ever someone does, that those actions could turn into a habit and the habit can turn into the personality.

I noticed that after i saw friends slowly change into a monster or into a business man, father, worker or what ever.
There for i concluded that its important to do something right or correct, because those actions can turn into a habit, and the habit can determine your life.
For that reason i would never lied to people about business, or trick them to take there money, because then i would master that skills and will only trick more people in the future to get more money, what leads to many angry people after me and then i could never be free.
I saw that in actions from others around and i would never take that road.

It's like, better to be a servant from a poor master then to follow that path.
So its not a secret for people who knows how to make money, and i know! Trust me. And thanks for your comment!