It gets all your followers and gets the average of their follower count. If yours is less than the average you're underrated. If yours is greater than the average you're overrated

here’s the code: https://github.com/Oren-Lindsey/wasteof-ranking/blob/eb0b7e163cc95a6a39b829d1c946b71d5e050867/src/routes/user/%5Bname%3Dvalidname%5D/index.js#L61