content: I can't speak for how the major studios handle their IT security but in the indie world, back before bit torrent, the best sources of pirated videos used to be the folks that worked on the edit process, or for the press dept... If you knew someone there, they could always run you off a dupe as they did so for legitimate reasons and so it wasn't too hard to get an extra copy made to give to your friends. So I wouldn't be surprised if dupes are made legitimately and some enterprising individual started seeding them. Of course, they could also be fake files being seeded. This tactic is employed at times to try and swamp the torrent sites with useless downloads so that folks give up trying to get the movie.