Platforms need to be vetted to make sure they're not going to damage the brand. No one is posting on 4chan, because the negative attention would outweigh the positives. Companies have even banned advertising networks if their ads appeared next to content that would change people's view of the brand.
I 100% don't doubt there's a layer of verification of content, maybe relationship with the platform, and etc.
It is though amusing that they're on a platform that given the idea we're working with here ... has I think measurably moved towards more of the less desirable content.
One of those things where the established system gets a pass but there's a delay in adopting anything new because of the same issues already present.