Because Zimbabwean consumer doesn't influence USA; but USA consumer influences rest of the world.

I can't think of any technology besides micro-finance that has trickled-up to USA.

Counterpoint: WhatsApp and WeChat are huge despite not having much of an American presence.

That's not a counterpoint but a confirmation of the first part of the original argument. You just listed two examples of such apps that fail to influence America despite being huge in other countries.

To make a counterpoint you need to find something popular in USA with no uptake outside of it or something that influenced USA but came from outside.

Honestly, the iPhone is a perfect "counterpoint" if you're looking for one. Dominant in the US, but relatively marginal worldwide.

It's fairly less popular (it might have to do with high price) but nowhere near 'marginal'[0]: http://static5.businessinsider.com/image/58d04a02112f701f008...

It's also supposedly (I can't remember where I heard that, some tech channel on YT) the only non-Chinese brand that's popular at all in China.

[0] Admittedly I have no idea for context of the picture and had to get it from google pictures since I couldn't visit business insider, I keep getting redirected to a Polish version of business insider that has NO TEXT AT ALL (?!).

Also, what do people find so wrong with me pointing out that "here's 2 apps popular out of US but not in it" strengthens the "USA influences the world but not vice versa"?

Look at the world-wide smartphone revenue share and tell me if you think iPhone is "marginal".

Yup, marginal (below 14%):

https://www.statista.com/statistics/266136/global-market-sha...

Key word: revenue

I can't find revenue numbers anywhere. Do you have a source?

If Bitcoin gains significant adoption overseas, that pushes up Bitcoin's value everywhere, USA included; geographical differences in price will be arbitraged away. The increase in price might or might not lead to greater US adoption, but it'll still benefit US holders.

You’re just pushing your axiom up a level. You’re still presuming US adoption is the measure of success. WeChat isn’t used in the US, but it’s still successful.

Possibly using your phone for payment which has been long popular in Asia as well as Africa.