I think this is a bit like Ticketmaster trying to claw back some profit from scalpers. Every car commuter into the city needs a parking spot. Therefore parking

I think this is a bit like Ticketmaster trying to claw back some profit from scalpers. Every car commuter into the city needs a parking spot. Therefore parking garages benefit from the natural demand outstripping supply. And as driving demand rises further, garages can raise their rates (and they most definitely have.) $15 extra dollars per day to drive will reduce the demand, in turn lowering garage prices. Not saying they will drop by exactly $15 but the point is, an external party was able to benefit from the high demand, and now at least some of that goes to the city instead.