Amazon is releasing a new service called Sidewalk, which allows people to share their wireless network with their neighbors over a low-power Bluetooth mesh network. If you want to read more, Amazon has published details on Sidewalk here. The main benefit would be expanding the WiFi coverage for low bandwidth devices. Amazon explains that Sidewalk would enable outdoor devices such as security cameras and smart lamps to stay connected even when wifi connection is lost as they are often at the edge of a home’s wifi coverage. Additionally, this service can be used for Tile trackers to locate valuables. While the service is free, there are serious privacy concerns.