There is a hidden tab on all sites, showing participation. It can be accessed by going to the SE site and adding this to the end:
users?tab=Participation. This then sorts users into the amount they have participated on that site.
I am guessing this is calculated by:
Can we add a link to this tab so users can visit it?
This could help with:
- it being easier to see who contributes the most in that community
- it's existence could be made known to more users
It's only a tab link, it can't be that hard to add it.