Erm, why? We ran one for a while, but all trackers bring is trouble. I don't see what's wrong with our two current ones that are donated and using The Pirate Bay as a backup.
Just to give an idea of seeders and leachers.
I may be an ass in the forums but I make sure I give at least a 2.0 share ratio on torrents to ensure the cascade effect works, sending twice what I receive.
Other trackers work on the principle of those with under a certain share ratio don't get to access a file until they have given back their bandwith.That ensures that dedicated members get the file first and add to a pool of seeders that will share longer. In the long run files get shared faster and more efficiently. I've seen it work elsewhere, and you asked.