Well, are the USA really not an autarky Internet wise ? Of course it's theoretically open to other countries services but let the proof be in the pudding: which

Well, are the USA really not an autarky Internet wise ? Of course it's theoretically open to other countries services but let the proof be in the pudding: which are the important services or sites used in the US and not made in USA ? (just a thinking experiment, of course I remember there are reasons. There may also be reasons for Chinese)