Can you cite that? I would like to test it against lies, manipulation and coercion.
If what you were saying were true, then it would not be economically profitable to lie to customers. However we see that lying to customers is more or less rife. Therefore we must conclude that it is profitable to do so.
The guy who taught my accounting class was a former used car salesman. We were talking once, and I asked him how to tell an honest dealership from a scam one. He said it's easy, the honest ones have been in business for more than 5 years. In 5 years, one runs out of suckers, and goes bust. An honest dealership makes bank by selling again and again to the same people.
These days, with Yelp and such, it's even harder to get by by defrauding your customers.