SEO is likely the main factor. They had the same link during previous MYGT500s as I recall so it made sense to keep it for the already established rank and traffic.
Doubtful, but I'm hoping I see/hear something at SEMA this year regarding the 2017/18 GT500.
Usually if something is going to debut at SEMA, the internet has known about it for a while, correct?
At least from Ford.