They're effectively a monopoly. They starve out small, fast, competent competitors left and right, or buy them out. They don't care because they don't have to. The EU has smacked them around a bit, which was nice for Schadenfreude but didn't help US customers much.
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"I believe you find life such a problem because you think there are the good people and the bad people," said the man. "You're wrong, of course. There are, always and only, the bad people, but some of them are on opposite sides."
-- Terry Pratchett, Guards! Guards!