Earlier quoted context omitted.
What is “selling electricity doir-to-door?” Is that offering solar on roof services? Cuz I can’t imagine actually selling electricity door to door.
In some states (including NY and CA) electricity is partially deregulated so you can choose from different providers, even though it all goes through the same grid. There are actually sales people who go door to door or set up booths to encourage people to switch, usually pitching it as cleaner energy and/or cost-saving.
Imagine single shared spectrum easy to setup eSIM, easy to terminate contracts. Unfortunately most countries want your ID nowadays when you sign up for internet...