So what? We see that TIME domestic is a kind of local family reading while TIME international is all about world politics, economy etc. Different audience - different interests. That is about maketing. Americans don't like to pay for reading about world problems.
Don't you know that here in Ukraine we have local editions of, let us say, "Аргументы и факты", "Комсомольская правда" etc., that most central Russian TV channels have international editions?