You either do an interview or a member sends you an invite. It's a private tracker just like what.cd was. It's less elitist than most other trackers which are invite only and sometimes lock registrations completely. Unfortunately they have to keep a low profile and pick their members to avoid copyright trolls or being shut down entirely. The test isn't very difficult and there is a public page explaining everything one needs to know. It's more about showing some effort and making sure that you know how to act accordingly on a private tracker