I will be one of those not opting in to a leader board, it’s not my cup of tea or coffee even.
I can’t see me spending anytime looking at it. ( seriously I have better things to do) 
being on here is one of those 
I will be surprised if I can tell where an individual lives from any kind of leaderboard. I doubt it will give someone’s address. 
Will it be focussed on submitting? 
It may be about that other wayfarer activity reviewing. As far as I am aware it is not so vital where you live when reviewing If you choose a bonus location wisely you can get a good flow of reviews whether you live in central London or Benbecula.
So maybe let’s wait until we see what sort of metrics they decide upon?
With regard to disenfranchised wayfinders you mention, happy to hear about ideas of what you think this covers and the problems.