Interestingly, they all redirect to a 404 page except Cities/Pre-register, at http://fiber.google.com/cities/ http://fiber.google.com/cities/ which is a 'broken

Interestingly, they all redirect to a 404 page except Cities/Pre-register, at http://fiber.google.com/cities/ http://fiber.google.com/cities/ which is a 'broken' link. What could it mean??!?