The answer lies in the nature of Glass’s music. You cannot listen to one track of Music in Twelve Parts (which is half of album 12 in the torrent) and understand it. You need the whole 3-hour arc.
In a 2012 interview with The Guardian , Glass was asked about torrents of his work. He laughed. "When I was 25, I was driving a taxi and moving furniture," he said. "The only way I heard Bartók or Shostakovich was by taping it off the radio or borrowing a friend’s scratched LP. If a kid in Peru downloads Einstein on the Beach because he can’t afford the $80 import CD, that kid is my audience." The Grand Philip Glass Torrent -- 43 Albums
The Grand Philip Glass Torrent has multiple versions floating around. The original 2006 upload was variable bitrate (V0 ~245 kbps). It was sufficient for laptop speakers but a sin for audiophiles. The (re-seeded in 2014 by a user named "Minimal_Chang") is entirely FLAC (Free Lossless Audio Codec). The answer lies in the nature of Glass’s music