They don't just get stuff for free, they get paid too, and rightly so, and also, they often do not make "enough money" at all. If you were a popular artists using BKP, your use of them would only go towards making BKP more money, and knowing this, you would willingly buy the pickups? I'm sorry, but that is not how things work, if I scratch someone's back, I want mine scratched too. I would want free pickups, and a nice contract, because there's no way I would let someone else make money off my back while I get nothing in return. You have to understand that if an artist using a product is making a company money, they should absolutely be getting the stuff for free, and being paid too.