As others have noted, there is no traditional CS at BWI, but the Boardwalk Bakery has a very good selection of breakfast pastries and sandwiches and a decent selection of lunch sandwiches to choose from, and we were always able to find something to eat that either used a snack credit (all the pastries, which make a nice breakfast) or a CS credit (for the sandwiches, drink and dessert pastry).
We never went hungry, staying on the Boardwalk!!!