Duh. If anime would be available globally, with subtitles, for a decent price, everybody who loves them would buy them.
But since good anime can take decades to make it over the ocean and be insanely expensive, people download it. And then they buy the originals, mostly for better subtitling.
I think i paid over 50 euro's for Paranoia Agent. Which isn't even that good. Wolf's Rain costs me over 100 euro's. A chinese bootlegger sells all the Ghibli movies for about $30.