> Imagine scenario - there is a totalitarian government in some banana republic that forces these companies (who are already global) not to support dissidents of it's regime in order to operate in their countries, what moral high ground will they take?

This is already how it works with gambling and sex related sites in the United States. The CC processors crank up the merchant fees for those businesses (sometimes above 30%) and in exchange congress backs down on whatever regulatory threat they have pending. Then congress can tell their constituents that they are “cracking down on vice”