You are paying to use a tracker, which is a central server … So how are you accomplishing that goal? The only way you are getting stuff off P2P is by using a central server to tell you where or how to get it. Torrents are just a bunch of servers owned by someone else… How is that different? Because you are getting smaller chunks from several different servers instead of larger chunks from fewer servers? Seems like you are splitting hairs at that point.
Giving back what you take, that’s what paying money to the server is in lieu of.