It is a fact that many persons who studies the psycho-spiritual processes of India, China and Japan, are now using those methods in their jobs as one is sometimes forced to use whatever one has to generate an income for the lifestyle one aspires for. A similar thing happened after the death of Sigmund Freud where even his relatives took it upon themselves to get incomes by using their knowledge of psychology and human behavior to help commercial interest to influence humans to buy products. Resisting this tendency to sell out is a task that many aspirants fail at. How do you not use what you know about meditation to make a living, because after all you do not want to be a pauper and you want a certain standard of living where you are not the in gutter. Thus it becomes necessary to commercialize yoga. As people say, why not make money doing what you really want to do, what you really enjoying doing? Sounds reasonable doesn't it?