The H-index I mentioned gets close to that. Yesterday we had about 100 users who each took over 100 game actions (for example, placing a chip is a game action).

The H-index I mentioned gets close to that. Yesterday we had about 100 users who each took over 100 game actions (for example, placing a chip is a game action). Beyond that there's a long tail of people with much fewer game actions. I've found that the intrigue of figuring things out drives some of the engagement, though many of the items on the page have explanations when you click on them (including Nectar), and we have more info at growhive.io/blog.