They are coaches who just interested in making money and they are some who just want to make a living from coaching. Also they are some who wants to make money the proper way or ethically.
There are many unethical coaches who just coach to make money as these coaches charge a high price for non-quality coaching to the athletes/students. They just want volume, therefore they conduct classes with more than a hundred students by themselves or the most with another coach. In actual fact, they just there to collect fees and let the black belt students run the class for them. Mind you, those black belts also pay fees to train NOT to teach. How then can you justify their charges? They charge the students to be coached by their peers from the same school.
Then ethical ones get 'killed' by these unethical coaches as people will generalized us to be like them. Why they want to pay us the same amount if we are like them, which in fact we are not. We provide good coaching and at the same time we also need to earn a living. And coaching is our life. It's in our blood. We love doing what we do, and hope at the same time to make some money the ethical way to provide for our family etc.