We’d like to create a leaderboard for people who participate in topic and posts for particular category and tag.
Is that possible?
I see that groups is an option but it would be tricky to group people who are participating and include them in the score. Perhaps we could do that retrospectively for people who create topics and posts and like posts in the category + tag combo, yet we’d still miss people who score points for reading/visiting. 
If not, is there a data explorer query we could run.