The instrumental album "Ghosts I-IV" was released under a Creative Commons BY-NC-SA license, and the music went everywhere - and you can draw a line directly from that choice to the Oscar for the score for The Social Network.
Concert photos, wallpapers, and other photos are still up on Flickr: https://www.flickr.com/photos/nineinchnails/albums
And the NIN camp utilized Vimeo alongside YouTube: https://vimeo.com/ninofficial
Rumor has it that Trent Reznor himself uploaded material to The Pirate Bay, because he didn't like the audio quality of the rips that were already floating around. There are three compilations that appeared, with custom artwork, including at least one exclusive version of a track that hasn't appeared anywhere else.
(p.s. wot up volk)