Amazon devices will soon automatically share your Internet

I suspect Spectrum is doing something similar with their cable data service. If I'm using my phone to listen to an on line radio station, as I walk down my rural street, and I go by my neighbor's houses, the phone switches to WiFi. As I hit empty spaces between homes, it switches to cell service, then as I hit the next home, back to WiFi.

Since there is no data limits with Spectrum it doesn't cost anyone anything, but I do wonder how it works since I never signed up to provide WiFi to others. Am I imagining this?