Need to be licensed as an MSB is based on where your customers are located, not your business.
The US could pass a law that Sainsburies (a UK grocery store, with no US locations) has to employ a jazz band at every one of their stores for 3 hours every friday afternoon... but it doesn't matter, because the US does not have jurisdiction over the UK. Even if a US citizen goes and visits and stops by a sainsbury and is upset at the lack of a jazz band.
As you've probably noticed, the US goes around the world and enforces its will all the time. Whether its via various asymmetrical treaties, direct military invasion or some other tactic, they usually at least move the needle towards the direction of their desire.
Which is not to say that the US is alone in these actions. There are lots of entities that enforce their will like this. Russia for example just recently went and took a nice chunk of land for itself in the form of Crimea. This was neither new nor surprising, especially for me as I was born in a Russian occupied territory.
As it stands today, there are some entities that are effectively more equal under the law because they have infinity money. One of the most important rules for a successful adult life is to never cross anyone with infinity money (unless you yourself also possess infinity money). Money talks.