They have the notice location incorrect or it is an auto header for the US website or something. The Americas is not changing that I know of.
If you look at the Americas EULA it goes into just who you have a contract with, and notes that anything outside the US, Canada, Mexico has a different contracting entity.
Your use of the Platform is licensed, not sold, to you, and you hereby acknowledge that no title or ownership with respect to the Platform or the Games is being transferred or assigned and this Agreement should not be construed as a sale of any rights. All access to and use of the Platform and the Games is subject to this Agreement, the applicable software documentation, and our Privacy Policy (accessible at https://www.blizzard.com/en-us/legal/) (collectively, the “Complete Terms”). The Complete Terms are hereby incorporated into this Agreement by reference (with this Agreement controlling any conflicting terms) and represent the complete agreement between you and us relating to use of the Platform, the Games, and related services and products, superseding any prior agreements between you and us, whether written or oral.
Except as otherwise provided below, if you reside in the United States, Canada, or Mexico, use of the Platform is licensed to you by Blizzard Entertainment, Inc., a Delaware corporation, 1 Blizzard Way, Irvine, CA 92618, and if you are not a resident of the United States, Canada, or Mexico, use of the Platform is licensed to you by Activision Blizzard International B.V., Stroombaan 16, 1181 VX Amstelveen, the Netherlands (Blizzard Entertainment, Inc., and Activision Blizzard International B.V. are referred to herein as “Blizzard”, “we,” or “us”).
EDIT - if someone is actually a lawyer and wants to chime in, I am happy to learn more. I only know the basics on this and that they are separate and due to closing the office in France they had to change the EU contracting.