Comment by arkades

>If you have any friends who are not rich, or are European or South American

One: 55-60% market share in the US, by definition, is not confined to "the rich."

As to the other categories: my personal answer to "If you have any friends that aren't American" is "that's what whatsapp is for." I imagine for a lot of people the answer is that, or "I don't, actually."

Like, all the teenagers in my family. Their list of non-US friends is near-zero. Their non-US family are all on whatsapp.

They don't experience a gap.