Earlier quoted context omitted.
What are they supposed to do? There’s a difference between the letter of the law and reality. You need deliveries and couriers to make a city work, and NYC is no different.
Problem is that only people or companies with deep pockets can violate the law that way. If you don’t have money for lawyers you have to pay the tickets. That’s how end up with a two class society where some people are above the law.
Parking tickets are tagged to a car, not the owner. So when you don’t pay in NY, your registration is suspended. Guess what? Bad operators don’t register in NY! (Rental/Lease fleets are registered in Arizona and Indiana, who are “business friendly” for this reason.)
Legit companies get a type of permit that can be suspended. But your shady contract delivery people flaunt these rules and disappear/reincorporate if they get caught.
That’s why the Amazons of the world are moving away from UPS/USPS/Fedex. The contract people are the bottom rung of society and agree (out of ignorance) to take on liability that an actual business would price into their rates. (This includes stuff like making sure the brakes work on the truck or that the driver is licensed, not just parking tickets)