Whenever i look at the “kr” tags and the number of users on that platform one could easily tell that we have alot
of koreans on the steemit platform,,i think the country with the highest number of users on steemit is south
korea then followed by united state of america then followed by nigeria....
you can see the tags, i think Asia (China, Indonesia, Thailand) is strong, but also USA, Latin America and Europe
An interesting method in trying to figure it out, I saw this question and wondered if anyone would be able to give a more informed answer so think this is a step in the right direction. Maybe the best we have at the moment is communities as you say.
I don't think anyone will be able to answer this truly though as there it's not logged anywhere I believe, maybe by the Dapps, but not in the blockchain itself.
That should be the United States of America