We had success in our county and town canceling contracts, but that doesn't mean they are banned from private land.
I'm not totally sure, but it may even be the stupidest of all possible outcomes: they still exist, the cops can't access them, and their only value is selling private information.
But the cops can access the private land cameras. I would wager most small to conglomerate level business opt-in.
Last I checked the Lowes and Walmarts of the US share this data as its locks down shoplifters quicker.