It’s not quite the case, it’s because 3 Korean networks created a streaming platform Kocowa a small part is accessible through Viki in the Americas through Pass Plus.
Other dilemma is that all other big streaming companies have started producing these dramas since there is a great demand. So like Viki produces some content and shows as “only on Viki” the other platforms do the same.
Besides the producing and actor fees have incredibly increased, so licensing became also more expensive… It’s a rat race!