So they are deliberately extorting local business people
lol, no.Free parking is a great example of tragedy of the commons. Without time limits people will abuse it. Case in point: California. A handicap tag out here will grant you an exemption to whatever time limits are posted regardless of whether or not the spot is reserved for handicapped drivers. What ends up happening is people with handicap tags will just take up all the spots all day, leaving nothing for anyone else.
Or said another way, they got tired of chalking tires
Having worked in the smart parking meter industry I got to talk to city folks and, while it may be painful to hear the actual enforcement rate is pretty darn low with a few exceptions (typically time of day based ones like street cleaning and rush hour traffic). It's extremely labor intensive to monitor every spot, so enforcement is pretty haphazard. the definition of "a block" is quite loose
This is, in California, defined on a city by city basis as far as I can tell. San Francisco defines the minimum distance as 1/10 mile (or 1 block), Pismo Beach specifies 100 ft or 1/10 mile on the odometer. Both of which seem pretty specific.