According to National Audio Company, the largest of the companies still involved in cassette manufacturing, the company sold nearly 10 million units last year (remember that vinyl only did 13 million with a lot more hoopla about it).
Of that number, a surprising 70% was actually production copies made for two of the major labels Sony and Universal, along with a few small indie labels. The other 30% were blank tapes.
O RLY? Who's buying?
Just like vinyl, it's the under-35 crowd who's gravitating back to the format. After listening to digital music all their lives, they've found they preferred analog.
The hipsters are buying cassettes. I find this amusing.