Me too, but then try the same URI at www, www2, www3... it's a 404

It can still be a load-balancer of sorts, but at a higher layer than layer 7. Let's call it level8 or the 'wetware' layer.

But yeah, not much duplicated content unless you consider translations 'duplicates' (which it is, at layer8)

Or there web presence is to use a technical term "$%^T"