I say this cause I observed for a long time. Right now, "About us" has a lot and it sure should have a spot in the high rated comics. But I have observed it since it began and let me tell you, it was fishy. When a comic updates, it falls back a few rank and this happens to all comic no matter how popular, even Sarah Scribble. But for "About US', everytime she updated, it never fell back. One time it even went up from position 12 to position 8 after updating. I believe LINE cheats on the comics they like. They manually control it. It's the case for "About Us". Looking at its ranking now it looks fair, but if you observed this comic since the beginning it's clear LINE did favoritism on it.
Now I spotted other suspiscious comics like "Love curiosity" who never falls back when all comics in the same range do fall back a few ranks. And that comic don't even update weekly. Also "I'm dating a celebrity" is the same. Just observe, you will see how suspicious it is.
I'm not saying this to bash any authors, my point is that LINE does favoritism and handpick the ones they want on top (except for those who have too high number of subs such as scarce Clover, etc... I believe they are fair)
I also notice how they throw comics they don't like very far. I won't say the names but they do that too.
And for nine stone, I believe it was handpicked and manually placed high on WEBTOON. If you look and compare to other webtoons with same stats, you will see how his stats do not match at all with the popularity surrounding him. there's many comics who has same number of subs but 2-3 times more likes and comments and they aren't even close to the top. popularity is based on likes, comments, views, and subs. So how can it be placed so high when all of the above are way lower than at least 15 comics of same #of subs? it's same with Hinata.
All this is mostly computer generated at first, they have rules and views and update time that based on those the computer or whatever their system handle it. But they also manually control it if they want a comic to be on top by inserting a comic in the tops or blocking the falling back if it updates so it can stay on top.