Tracker's Name:	BakaBT
Genre:	Anime
Sign-up Link:	https://bakabt.me/signup.php
Additional information:	BakaBT is an Anime Tracker. Formerly known as BoxTorrents, BakaBT is well known tracker for the fans, It focuses on Japanese anime and related content, including Series,OVA, Soundtrack, Manga, Movie, Live Action, Artbook, Music Video...

I don't think BakaBT was ever closed. And it's not a pure private tracker,it's a semi private tracker.