Getting onto many private trackers is a real pain in the ass, involving lurking on some IRC channel for who knows how long, begging and sucking up to people until somebody gives you an invite (assuming the tracker is even open to new applicants at the time.) Then, even with an invite, often the admins want to interview you to see if you answer probing questions like a pirate or a lawyer. The whole thing is a pain in the ass. These days I just say YOLO and use public trackers.