Many if not most of the consumers of that music will never actually listen to the vinyl. They might not even own a turntable. Instead, they purchase the vinyl for music that they listen to elsewhere in order to have full-size artwork and use it as room decoration.

And until recently (and painting with a very wide stroke), the percentage that goes back to the band tended to be better for vinyl than the other formats. Since the record companies saw it as a dead medium, it wasn't really high on their list for negotiations. I've bought vinyl that I never intended to play for that reason.

Well edm was/is released on vinyl for djing purposes although these days most club djs use cds or usb or ableton.

There are still DJs that spin vinyl, but they're rare.

Not rare in the EDM world.