According to this, Amazon is getting police departments, in the US at least, to enter into secret contracts to push their Ring home security products to residents, in exchange for free products as well as access to customers' recordings. It sounds like they may still have to actually request the recordings, at this point, but it does show them the locations of Ring cameras, and there is no oversight. This seems to be getting a little too close to what would be a voluntary "big brother" type situation for my tastes.
Source - https://www.vice.com/en_us/article/mb88za/amazon-requires-police-to-shill-surveillance-cameras-in-secret-agreement