Down the Korova Milk Bar, moi droog
I wonder whether the anonymous world of internet-shopping, and the chance to "audition" tracks before purchase, has led to purchases from people who might previously not have bothered to seek-out classical music (often on sale in shops, or departments of shops, which didn't entice them in for other purchases), or where they felt uncomfortable surrounded by intimidating boffins ("my dear, you should have her Paris recording! etched onto wax cylinders by the abdomens of specially-trained bees")?
I'm more than sure that a lot of such sales are made by the "Customers who bought this also enjoyed..." marketing.