I suppose SpaceX plans to start with us-only offerings. I also suppose it will take a while until it reaches developing countries.
Does anyone have a better take on this?
Most of Brazil is actually a bit out of luck in that it's too near the equator, so satellite density overhead will not be that great anywhere but the very southernmost areas until there are lot of the birds in the sky, so you won't have service immediately. But places like Chile and Argentina will have great access pretty quickly.
However, as a caveat to that the receiving antennas will be expensive at the start and SpaceX still has to negotiate access to spectrum in every country separately, and in poorer countries this will most likely have to be paid for, so that will hike the prices up.