On: I found a 1-click exploit in South Korea's biggest...

[nextworddev]

Not sure what you are getting at, but Line is deeply penetrated into South East Asia as well

[Prickle → nextworddev]

Last I checked, 90% of Line users were in Japan, and Facebook messenger was most popular in SEA.

So I am simply surprised. My knowledge must be incredibly out of date.

[teractiveodular → Prickle]

LINE is very popular in Thailand for unclear reasons, I've heard the theory that their cute sticker packs set them apart in the early days. In the rest of SEA Whatsapp is the most popular.

[maeil → nextworddev]

Taiwan too.