Lets be honest. Its the same for Alipay's app too. They both are their own ecosystem and they are going to be allowed without a doubt, if Apple was to touch either of these Apps it would be seen as an offense to the red flag and I could easily see the mainlanders boycotting it.

Sounds like grounds for an antitrust case. You can point to special treatment of apps that risk Apple's position in foreign markets, where Apple is willing to bend its own rules to retain its market position.

Coinbase: please sue these cash fat rent-seeking clowns.

Does wechat allow users to make payments to each other? I wonder if that's what this is really about.

This isn't entirely true. Kik had their own app store for years: https://dev.kik.com/#/home

It just wasn't very popular, it seems...