If your knowledge graph contains data related to social links between users, like GitHub or Medium does, a brand new field of recommendations is open to you. Because you know which person a given user likes or follows, you can have a better idea about which type of content this user is likely to appreciate. For instance, if someone you follow on Medium claps a story, it is much more likely you will also like it, compared to any other random story you can find on Medium.
Luckily, we have some social data in our GitHub knowledge graph, through the FOLLOWS relationships. So will use this information to provide other recommendations to our users.