Mail globalization

When you subscribe to a magazine published abroad, you are not surprised that it arrives from the country involved, with a sticker explaining that the editor has a subscription with the local post. Like this label on a Scott Stamp Monthly plastic bag, coming through the Atlantic from Jamaica, New York.


But, surprisingly at the beginning of July, when the two first magazines were sent to me (I asked my subscription to begin one month earlier to obtain the Machin series article) :

The two stickers :
* one from the USPS,
* the other is a franking from Auckland, New Zealand.

Two hypothesis :
* it is cheaper to sent these kind of mail from the United States to Europe through New Zealand, than directly.
* New Zealand Post is a USPS contractor and sent these kind of mail.