Double crossing your family, friends, or any individual for your own personal gain without compensating or crediting them in any regard.
My family member and I went in on a business deal together. I did all the work behind the scenes but after we made money I never imagined they would pull a Mark Zuckerberg.
When finance content creators rent out fancy cars and flexcash to seem richer than they really are in order to promote and sell their “get rich quick” courses.