RARBG had a unique way of grouping TV seasons. The DB preserves the "season pack" IDs. If you ever wondered why RARBG's Westworld.S04.1080p.AMZN.WEB-DL.DDP5.1.H.264-RARBG was 10GB smaller than the competition, the DB contains the mediainfo logs to explain why. It's a film student's dream.
But if you are a digital archaeologist, a data scientist who studies online piracy trends, or a torrent historian who wants to know exactly why RARBG was superior (hint: look at the "encoder notes" column), then this zip file is essential reading. rarbg-db.zip