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Exactly this. WeChat is an example of what Amazon can possibly do that no other US company is remotely capable of.

I was going to say I can imagine an app that combines FB Messenger, Yelp, Travelocity, OpenTable, GrubHub, and Uber. But WeChat already has all these things (either via companies they own or via partnerships).

Amazon also has Prime, so they can offer millions of subscribers incentives to prime the AnyTime pump.