It's yet another fake.

Anyone can create a key with any name or email address they want on it.

Someone created a key here, they typed "satoshi@vistomail.com". It is not Satoshi's key, the name and email address are just entered by the user and not validated.

Then they signed a message that says "I created Bitcoin, I am Satoshi Nakamoto - Craig Wright" -- that's what the BEGIN PGP MESSAGE part decodes to.

Because they're incompetent with PGP they didn't use the clearsign option, so you have to decode the message to see the text being signed which is probably contributing to confusion.