TorrentSeeds.org is a private General / 0-Day Ratio-Based tracker, now with Open Sign-Ups for a short while. In the rest of the year it requires an invite to join their community.
The pre-times are great. Definitely a top tier tracker from this point of view.
You can find a very big collection of Movies, TV Shows, Games, Music, Ebooks, Adult content and many other, in their huge database of over 850000 torrents.
Being a ratio-based tracker, you have to seed each torrent for at least 72 hours within one week or until that torrent reaches a 1:1 ratio. Your overall ratio needs to be above the 0.4 level, otherwise you will be considered a Low ratio user and your download rights will be taken away from you if you don't get it back up in time. There are over 25000 active users right now.
Donations are available through PayPal and Coinbase and with a few euros, your life on the tracker can be much much easier. Many perks for donors, including GBs of Upload, FreeLeech Tokens, Invites etc.