Speed.cd
Came across a document provided in a torrent that had something along the lines of "Downloaded from Speed.cd" and I was like "Hey, Imma try it out." So, I came to the site and saw that it required a membership and thus I was like "Huh??". At one point there was a "Try your luck and tell us why you would like to become a member." form. They also notated at the bottom "You only get one chance. Don't waste it." or something along these lines. I gave it an attempt and was approved. And so then began my journey of Private Trackers. Of course, it was TI that shed light on what a Private Tracker even is. Love TI. <3