I've been a user for many years - would love to know how large this awesome and vibrant community is. Is there a way we can estimate it via the API etc?
Also a breakdown by country would be nice. I heard that most aren't in USA, but that's all I know.
You could query the live api:
https://hacker-news.firebaseio.com/v0/updates.json?print=pre...
Do this periodically and you can have user activity stats