I very very much doubt that that this many user created styles exist for the KN7000 in total and the chance of them all being non copyright styles is so miniscule that I would guarantee that most if not all are indeed from commercial style developers. What ends up happening in these sort of cases is that I end up getting contacted by very irrate developers who have found their styles in these collections and ask me to remove the offending link. Unfortunately by the time they become aware of it the damage is already done. If it walks like a duck ....

Even if they were modified Technics styles they are still copyright. Even though Technics users share these types of modified styles amongst themselves selling them is an absolute no no.