Maybe I misunderstand the parking pass thing, but I’m not sure why you would get the money back just because you didn’t use it. My assumption (which may be wrong!) is that while you had that pass, capacity was allocated to you and could not be sold to someone else. Like buying a seat ticket and not showing up.

That said, I wouldn’t be shocked to learn that isn’t quite the case. I should probably give you the benefit of the doubt.