I think Korea goal is to get the genre of Level Up Systems and Tower, while Japan is Isekai, which is now a genre, but there's not many studio adapting Manwha it only adapts promising manwha, and the story is easy to make and upload, that's why there's so many of them, it is just like isekai but I wonder what they will call the next genre if it happens? Maybe in korean words lol.