If it also was Preferred, of course there would be that cost, at least. Due to limited availability, some minimum, preference or handling fee would discourage just topping off. Then maybe extra over some unusual amount. But there are several scenarios. With level 2 or limited rate charging, the Hummer simply won't get a full charge. Or maybe people CAN'T leave their cars there all day, so preferential treatment (or penalties) is appropriate.Would you be against EV charging being included in with the Preferred Parking? That way it isn't "free" to General Parking.
I don't see "free" being that huge an incentive except for those who want to game the system. For those who really need the charging, availability is more important [EDIT] than it being free [/EDIT]. They're not trying to attract people from the competition across the street, they want people that actually empty their batteries getting there.
Free, insane performance and giant EVs may be important to a transition, but are contrary to the long term solution.