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Followers which is the most meritocratic (I think). My idea is based on YouTube's system to be honest.

I could see two approaches. One approach is different categories ( followers , rep etc ) and the other and maybe most difficult is one metric that combines all .
Either way, I am with you.
To be honest all I want is ROI on my time and money invested here and to have fun. Which I have both ( more or less ) :)