If that's true then they're already doing it and they should have it free sometimes. I'd suspect that the goal may be generating maximum revenue rather than ca

If that's true then they're already doing it and they should have it free sometimes. I'd suspect that the goal may be generating maximum revenue rather than capacity at lowest price though. If the goal was variable pricing so you get a spot at lowest price (free when possible) then I'd be happy with that. You could have an upper bound price per lot if you wanted people to know what they might have to pay worst case, but uncapped would be interesting if you want there to always be a spot available.