I agree with this, social media is most often won by the service reaching the most users. Wechat is the only app you can use to chat with people living in China

I agree with this, social media is most often won by the service reaching the most users. Wechat is the only app you can use to chat with people living in China, and to (easily) chat with home when in China. So why have two apps installed, when one works everywhere? It's bad enough that the Chinese market is already a bubble (foreign companies need a Chinese partnership to enter), yet the Chinese companies can freely operate in the western world.