There was an interesting comment on Asher's most recent "curation league" post where someone had used @penguinpablo's stats combined with Asher's list to calculate that the top 100 on his league list possibly creating as much as 5% of all posts on Steemit... and they account for less than 0.2% of "active" users.

I think the "gamification" of social media DOES work if applied properly. Just imagine the impact a group like that could have if it even doubled, or tripled in size. I don't have the data handy, but I seem to recall someone else calculating that retention within the leagues is multiples higher than the community as a whole.