A leaderboard as in a ranking of users by points? A user would get points for posts and comments in the community, I assume? That's an interesting idea, but it runs up against what exactly would it mean to post in a community? Most communities set a number of tags, and it seems like many of the posts are not actually posted in the community but are shared with multiple communities by using their tags. So in that way, I might write one of my haiku posts and post it in my community, Blockchain Poets, but then using tags I can also "post" it in The Pub, the Japan community, the other poetry community, and so on. Would I get points and appear on the leaderboard of all these communities, or only in the main one I posted to?