When you buy a premium membership, it says "Cart-Chess.com" as the page title before check-out. There are a few problems with this:

1-It's not a true cart because you cannot add or delete things to it more than once. You also cannot have more than one item.

2-Chess.com doesn't have a way to access this "Cart" besides just buying a membership.

3-You cannot add multiple items to it.

This should really be called "Summary".