Why Does WeChat Block Competitors, While Facebook Doesn’t?

On Tuesday 15th of January, WeChat blocked 3 competing Apps on their launch day: Liantianbao (聊天宝) - formerly called Bullet Messenger, Duoshan (多闪) - launched by Tencent's archenemy ByteDance, and Matong MT (马桶MT) - launched by Ringo.AI. Is this approach to competition specific to WeChat? To the Chinese market? And how do Chinese and Western companies differ in their growth strategies?

Jan 18, 2019 ... ... story than WeChat blocking Douyin: Facebook merely blocked the friend- finding feature from Vine (preventing it to access users contact list).

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