I pirate because the uploaders provide an infinitely better service than the cable companies or even Hulu/Netflix etc. I get DRM/region free ad-free files that work on any device, at great resolutions and quality, barely minutes after the episode has aired.
Why the hell would I go back to their terrible services when that option is open to me? Now yes i'm not paying for the content, but often that's not an option anyway, (see The Oatmeal's comic on trying to buy Game of Thrones online). As has been voiced a million times, if these companies fired all their old idiot suits and brought out a 'Steam for movies/tv' that had all the added value that Steam brings it would take off like a rocket.