This is a phenomenal application of how fine-based bounties can be used to rapidly improve compliance with the law. Incredible work. I would absolutely use this if I lived in NYC; I'll recommend it to my friends there.
I wish it was was more common around the world. Not just with parking though, but everything in the context of cars. Like letting the police install a permanent speed trap on your property or even pay for the privilege of them doing so. I'd bet that'd curb a lot of speeding in short order
If you want to curb speeding, the solution looks much the same: Pay reporters some portion of the fines collected from the speeder. You will very quickly see a cottage industry of Internet connected dashcams and on-board AI solutions spring up, because it's practically free money if you drive safely yourself for long enough. Pretty soon nobody will be speeding, simply because you never know who or what is watching.
This is a set of economic-legal policies I've been writing about here and there for a long time. It's great stuff.