WeChat is also super popular in SEA. So we have Line from Japan, WeChat from China, KakaoTalk from Korea as the leading contenders in Asia. You see TV commercials of the apps endorsed by celebrities. They are evolving from simple chat app to a full social platform with own apps and games. You can say they compete with Facebook. I overheard a teen asking his friend why he is still using Facebook. Social apps to the teens might not be utility, more like clubs. And they want to be associated with cool clubs of the day.