The fundamental question here is whether the success of LINE and on a similar note, Kakao, can translate to other markets. We've already seen that WhatsApp and

The fundamental question here is whether the success of LINE and on a similar note, Kakao, can translate to other markets. We've already seen that WhatsApp and other messengers were much less popular in the US due to the ubiquity of free messaging. I wonder if there are other economic and possibly cultural factors that enabled those apps to succeed in their home markets but may be barriers in other places.