> * how does it matter what domain is used to display the same content?*
It only displays the same content if that content is compliant for the local region.
Thus, in the Nazi example, all off blogspot get the posts except blogspot.de, who filter it out somehow.
That's something that Youtube doesn't do with adverts very well - I'm in the UK, I've not left the UK, my IP geolocates to the UK, but I often get US ads in Youtube. Advertising law is different and often the ads are not compliant for the UK.
It only displays the same content if that content is compliant for the local region.
Thus, in the Nazi example, all off blogspot get the posts except blogspot.de, who filter it out somehow.
That's something that Youtube doesn't do with adverts very well - I'm in the UK, I've not left the UK, my IP geolocates to the UK, but I often get US ads in Youtube. Advertising law is different and often the ads are not compliant for the UK.