This is a problem the Voice.com social platform is attempting to tackle, read more about it here: https://about.voice.com/learn-more/. I'm not affiliated with Voice in anyway, just someone who is eagerly awaiting open registration.
You're right, technically there is nothing to prevent that from happening, but I think the idea is that you only get one "Voice", so if you want to align it to something you don't necessarily believe in for the sake of money, then you will have to suffer the consequences of that. Might be a good way to thwart paid attempts at spinning undeserved corporate-positive narratives.