It is legal by default. The question is: why isn't it illegal? Some quick searching suggests this scenario hasn't been tested in the courts. Like most things

It is legal by default. The question is: why isn't it illegal? Some quick searching suggests this scenario hasn't been tested in the courts. Like most things, you have to take it to the federal courts and establish case law, OR pass a law (good luck). It shouldn't be allowed. Microsoft shouldn't allow this, but they do, because they like having revenue from business partners.