> * Alternatively, American govt takes the position of "American companies don't have to follow the laws of random countries just because they accept IP packets from those countries". American companies eliminate their official business presence in onerous legal regimes but keep serving users there

Why would they do that? If they can't have a local business presence then they can't book local advertisers.

Which directly cuts any revenue they would get from the enterprise.

None of these companies need to have local business presences: they do because otherwise you can't get revenue from users in that nationality.