I drop off near the roundabout at BHX, along with lots of others from what I've seen, I can use a permit at EMA but the petrol station is just as good.
I refuse to pay the parking fee on principle.
I'm either bringing or collecting THEIR customers, none of which would have been using the airport had they not been visiting my company, so in effect I'm being charged a fee for generating business for the airport.
Anywhere else I'd be getting paid a commission!