"They'll still be tankie idiots even if BBC profile them."
That's not how it works. The more often someone is seen in a prominent position, the more legitimacy they receive in the eyes of the public and their followers.
"Surely thats what matters - the quality of the content, not who develops it."
The developers don't make the content, they make the framework that displays the content. They also promote specific instances on the platform's official site.