I just checked and Amazon is selling the obvious and deceptive Transformers rip off “Transmorphers” still so their rationale for nuking this publisher seems a bit fishy. Then I saw that these guys were on the right side of the “Sad Puppies” thing and it all became clear: the lefties targetted them in revenge. Most SciFi is unreadable SJW nonsense now so I haven’t followed it closely but I do know about the Sad puppies stuff and yeah, now it makes sense.
Not sure what type of Sci-Fi you like, but there is some great non-SJW stories being written by self-published authors, even on Amazon.