Interesting, I still think the hype isn't because it got more chapters, the plot isn't great check other Japanese mangas with the same topics psychological / horror.. Some are actually better. I think it's because the fact the western audience are highly involved in this... Meaning their opinion does matter, unlike Japanese mangas where the publisher care about the buyers who are Japanese girls. And apparently western audience found KS refreshing than all the soap opera themed BL, and colored BL is now favored thanks to the fact it's colored ( duh ) and weakly updated
You're welcome :), if I find/remembered others will recommend it to you
I agree there's more interesting physiological/horror manga out there (Monster is personally my favorite). However based on Lezhin's past ratings, KS was lowly ranked until more chapters were released similarly to how other contest winners are currently low ranking. Western audiences might have contributed to it's current popularity but I don't think western audiences had a large influence on its initial popularity when there was only 2 chapters available.
When all your fujoshi friends profile picture are all either YOI or Killing stalking ╮(￣▽￣)╭