>>15037985From what I hear, the KR branch went through a bit of a rough start, which probably gave it a bit of a bad rep. Most Koreans seem to use Twitch as well, which is what Niji's KRs also use, for Youtube they seem to speak Japanese or English to attract other viewers.
But it's also because South Korea seems fucking cursed to work in. Not only is there military service for dudes, but there's also study schools you have to go to, which makes part time streaming a pain in the ass.