There’s some misinformation floating around regarding Lemmy not having a karma system. While many have discovered otherwise, this is for those who may not have.
While it’s not exposed in the Lemmy default user interface, Lemmy does have a fully functional karma system and it is visible in third party clients such as WefWef and Memmy.
Do with that what you will.
Pretty sure this is just the apps adding up all the upvotes/downvotes you receive and not an actual Lemmy feature.
It’s right in the API: https://join-lemmy.org/api/interfaces/PersonAggregates.html
Returns: comment_count, comment_score, id, person_id, post_count, post_score