A lot of it is definitely for consulting purposes. I thought of going into that line - seeing how what movies, TV, and music wouldn't be taken even for free would be interesting to the producers of that content.
Looking at activity on torrents gives you a really good idea of relative interest in something, and in addition, on membership torrent sites, it could be cross referenced with the other interests of the downloader simply by using their history to give you some idea of demographic and to guide marketing strategies.
I mean more like "People who pirate your show also pirate Breaking Bad and Sons of Anarchy, but of the people who pirate Breaking Bad and Sons of Anarchy, there's more pirating of Futurama than your show." or "Though you think your show appeals to Friends fans, the people who pirate your show tend to pirate 2 Broke Girls more significantly than they pirate Friends."
Even more interesting to me are the surprising highly trafficked music and movies that are long out of print. Might be a good indicator of when to bring them back, and what fora to announce that in.
Looking at activity on torrents gives you a really good idea of relative interest in something, and in addition, on membership torrent sites, it could be cross referenced with the other interests of the downloader simply by using their history to give you some idea of demographic and to guide marketing strategies.