I did use the search box, but I could not find specifically what I am looking for.
What I would like to do is implement an old school affiliate program for Discourse. Simple as each user can create an affiliate link (linking back to the community). Each time the link is used, and a person signs up, the ‘owner’ of the affiliate link gets some kind of credit. Initially, a straight up count would work.
Down the road, I would like to integrate with the gamification plugin, but that’s for another day.
You can also look into the ?username system in discourse, which keeps track of and awards badges to users automatically when their links are followed. The button on the post menu adds this automatically as you grab the link.