There is a difference between a product that sells a few copies and one that is a best seller.
Classical music takes up to 20 percent of the space in some music stores, but accounts for about five percent of total CD sales. Most of the nuts buying vacuum tube amps and oxygen-free cables are into recordings of live acoustic performances. They are a real minor blip in the sales charts. They probably don't pirate much. They probably don't worry about paying $20 for an hour of music.
Kids spend most of the money and play their MP3s on crap.
Sigh... reminds me of the portable record player I carried around to friends' houses when I was a kid, I think it used an old fingernail clipping for a stylus. Steppenwolf never sounded better.