Packstater, boombreaker,
There are good and bad examples in every walk of life, lawyers, preachers, politicians, etc.
I once had a friend who owned a business in a rough, poor part of town. I asked him why he wanted to have a business there and his reply was the color of money is green. It does not matter what hand gave it to you.
True, some may "spam" and not do the best job marketing, but Brian Tracy and other motivational leaders are not going to back "smoke and mirrors"....