here are some examples of commercialisation that do not compromise the music, alistair andersons concertina workshop tutor, john kirkpatricks melodeon tutor, pete seegers banjo tutor, geoff bowens fiddle tutor or any tutor that shows exisisting traditional styles, is not compromising the music, yes, they are making money, but they are providing an insight into different styles of playing, they are providing insight into the roots of the music.
so commercialisation doesnt necessarily have to compromise the music.