Yes, you can use both snack and counter service credits at BC Marketplace even though it is not on the list. We did so just a few weeks ago now. There are tons of snack options and you can get those good sandwiches as part of a counter service meal.
In fact we found a number of places that accepted the plan that are not on the list and I'm sure there are many, many more since the snack options increased so much at the beginning of the month.
As Doug said, Cape May is not open for lunch. It is a buffet at breakfast and dinner and those count as TS credits of course.