As topic states, selling invites to one of the most popular trackers out there, Torrentleech.
Here is a review;
http://torrentinvites.org/f36/torrentleech-tl-general-0-day-2014-review-83479/Everything new interesting is uploaded fast - I've been a member since 2006 and I've never needed another tracker (except for porn), great support as well.
Proof of invite:
![](https://ip.bitcointalk.org/?u=https%3A%2F%2Fi.imgur.com%2FPT1lPAL.png&t=663&c=Olz54lBPqlwbWg)
The amount of torrents:
![](https://ip.bitcointalk.org/?u=https%3A%2F%2Fi.imgur.com%2Fmnjz5ug.png&t=663&c=Tg7echB9QFtYwQ)
The price is $10 per invite (not set in stone), it's well worht it. Private trackers like this will make you max your download speed. But you need to know what ratio is and how to build one in order to be able to not get banned (it's not hard, I can help you out if you don't know how).
PM me if you are interested.