There's an easy solution to that.

Seed something yourself.

Go buy a garage sale DVD of something that is semi-popular and doesn't already exist on the private tracker, rip it, and post the torrent yourself.

'S what I did back when Underground Gamer still existed; I had a version of Mechwarrior 2 that didn't already have a torrent, so I spent some time making a nice summary and uploaded it myself. Worked a treat; I had enough ratio to get me through my rough early weeks and never looked back. Until the site shut down, of course.