It was never a question, if they allow opinions, or don't, but always what are you allowed to publish on their platform. And as in any forum, private or public

It was never a question, if they allow opinions, or don't, but always what are you allowed to publish on their platform. And as in any forum, private or public, there are restrictions in place. The question is only, which. If it no restrictions where in place, then it wouldn't be longer a discussion platform either.