Why is WeChat not popular outside of China?

Related questions

1. Can WeChat be monitored?
2. Are WeChat conversations private?
3. How many WeChat users are outside of China?
4. Can I create WeChat without phone number?
5. How do I know if someone deleted me on WeChat?
6. What is recall message in WeChat?
7. What happens when you delete your WeChat account?
8. Can I recover WeChat chat history?
9. Can you use WeChat outside of China?
10. What happens when you block someone on WeChat?

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