The Counter Attack can be seen in the shop’s drop-down menu but not in YYF’s shop page.
Well, it’s called a mistake then. Everyone makes mistakes, even YOYOEXPERT.
EDIT: Oops, when you click on it it takes you straight to the shop and then when you click on Yoyofactory you can’t find it just like you said. That means it’s discontinued, and not a lot of stores have them either.