I did not know this. I did know, though, that when an effective VPN, singularly effective for its popularity, was free and didn't make clear its business model, it was vaguely clear that something of this sort was going on.
I have Hola VPN installed, but it is never active. When I actually need it, I go to chrome://extensions and enable it, and then go back and disable it as soon as I'm done.
Say (for the Canadians among us) Trudeau the father's 'Just watch me' interview. CBC has it on YouTube - but only if you're in Canada. Why?