Since I am a longtime user of this tracker I thought it deserved a bump.

As of today:

Users:
(male)124,055
(female)4,538

Total:230,187

Torrents:53,298
Dead torrents:13,072

Active connections:133,056

Seeders: 124,225
Leechers: 8,831

If you are into metal from around the globe (yes you can find some pretty unknown stuff here!) than this is your place to be!
The TS mentioned that this tracker is "hard", I beg to differ. The hardest thing is using Google Translate once in a while since a lot is still in russian (if I am correct) despite that they have an english site up (next to a russian one).
With the amount of users on metal-tracker its rather easy to maintain a decent ratio although I have no clue what the minimum required it is to keep up (could not find it either actually) since I am in the comfort zone already for a long time.

Good luck!