Amazon Sidewalk is the sleeping giant in your neighborhood: My colleague @[email protected] started exploring Sidewalk, timed to the company's launch of a developer kit, and learned that 90 percent of the US population can access a Sidewalk signal. Your Echo and Ring devices are basically part of a giant mesh WiFi network for other smart home devices, and it's turned on by default. Unsurprisingly, it's on the consumer to go into Amazon apps and manually opt out. More here https://www.wired.com/story/amazon-sidewalk-developer-kit/
Amazon Sidewalk Releases a Hardware Developer Kit

The massive public network taps into wireless bandwidth from Echo and Ring devices. Now, developers can build Sidewalk connectivity into their own gadgets and services.

WIRED
Actually this is the Snackfight account to follow: @snackfight! Still figuring out Mastodon servers here.