The overall "banning" of content on ERA is pretty arbitrary in a way, although I would say there is a ratio of the influence a company/game/person has which is weighted against the overall offenses and "issues" that are brought up to warrant such a ban of discussion.
Games like Hatred or content creators like Colin Moriarty getting banned, while THQ strategically marketed themselves to a bunch of alt-right white supremacists with little blow back.
If the company is large, publishes a wide amount of games or has massive sway in the industry, it's basically not going to get banned. No matter what the offense is. It's the issue of having a gaming forum, they represent a major influence and news in the industry, creating giant blind spots of discussion due to their problematic behavior is likely seen as "unwise".
And I don't disagree, although considering the offense that THQ Nordic did and the fact that ERA does ban topics/creators from discussion, the simple fact that THQ Nordic was not bared in some way is a black mark considering what they did.