As a YouTube creator, understanding your superfans is the first step to creating better content. With the SuperFan app you can create a leaderboard of your superfans; and do a deep dive into your superfan's engagement across your content.
It is a little disappointing that the definition of superfan is so vague.
For example, it could be someone who has a lot of comments, or a lot of time spent, or the frequency or amount of super thanks, etc., but I don't know which one you are referring to.
Also, I thought it would be a very good tool to be able to analyze any account (even if it is not yours).