There are proofs that 2 admins were shadowbanning them. There are these images that show the person asking for a justification, then the admin just tells them 4chan raid. Then the person said but I don't even go on 4chan and the admin just responds vote manipulation. And they deleted entire threads too and even banned people for upvoting these threads. Even a mod on /r/games got demoted because of it.
It's really weird, they just censored the whole thing, and there are solid proofs. I'll post the imgur album if I find it.