Prince was born in 1958. Suprising he is so Luddite in outlook. I guess something got him annoyed at the web, and he is being "THE ARTIST" in his pronouncements. Prince has always had that sort of flamboyant artist thing going.
As for his sales.. I don't think a long time big 'backcatalog' guy like Prince cares about the few bucks he will loose.
I just bought a CD copy of "1999" used, yesterday (I had it on LP, but why not at a cheap price.).