The Pink Floyd catalogue has two parts, chronologically and legally: The earlier albums produced with Roger Waters, and the later albums without him.
As I understand it, the band does not have control over the former albums, due to the legal battle(s) that occurred post-Waters leaving the band. So they pull the ones that they can (the later ones).
Ah, roger that. I'm tracking now. Still not a big fan of most of PF's music. I'll refrain from mocking them over this; there's so much more out there that this ammo is not needed. Thanks