Is it automatic? I mean is it possible for new tags to start appearing there on their own, whenever they become used by enough pages, or does each and every tag require a manual input, by the people behind itch.io, before it has a chance it can be found in the 'browse all tags' page. I assumed the latter, and by 'special status tags', i was referring to those tags which can be found there.
The portal would perhaps benefit from a tag search of the kind I meant, anyway. for example, for my game I considered adding an 'history' or 'historical' tag, but having no way to see which one of the two is already the most shared by the most projects, if any, I decided to stick with suggested tags, even though they were less relevant.