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Of course, those are clearly all Irish companies.

Population of potential US customers: 650 million Population of potential world customers(minus US): 7.1 billion

But sure, let's pretend worldwide subsidiaries of those companies should not turn a profit outside the US.

I think the author is using Silicon Valley as a tech coverall. Which is silly, but doesn’t ruin the point IMO

I'm sure that's the point the article is making, not that these companies have been stealing from the american taxpayer for a decade

“Silicon Valley” is a metonym for the technology and Internet industries and has been for some decades now.

Next you'll tell me that Wall Street companies aren't actually on Wall Street.