It wouldn’t surprise me if Amazon was handling all the logistics on the cameras and that could explain why Wyze doesn’t know the unique code for each camera.
The legal issues involved in that make it unlikely Wyze would want to step into disabling cameras. However, once assigned to a users account, I could see some restrictions put in place to prevent the same MAC from being assigned to two accounts. This would be different from “Shared.” It should have to be deleted from one account, by the original owner, before being added to another account. Cloud videos should also be limited to unique account/MAC records.