Anyone can share or write articles on Underground Network in the "User Posts" category, and as a result, the views and opinions expressed in these posts belong to the author only and not Underground Network. Heck, they may even contradict other authors on the site as well!
That's democracy in action!
As an early YouTuber myself, yes, this really is a form of censorship.
Source: YouTubers call out ad guidelines as a form of censorship