This is only possible because SF street parking is wrongly priced. If parking meters charged enough so that there were always at least one parking stall availab

This is only possible because SF street parking is wrongly priced. If parking meters charged enough so that there were always at least one parking stall available on the street within two blocks of everywhere in the city, you'd never be able to charge for saving one. The City actually installed the technology to set prices dynamically in a network with predictive systems so that prices can rise to keep those free spaces open. But the city insists on charging so little at the meters that the very chance to pay such a low rate is worth $20. Let's have market rate parking in The City so drivers can always find a place to park. The money they pay for the privilege could be used to make MUNI less awful.