@matigo Weird. We have a gas line here. (Dating the start of our gas service: the company that owns and maintains the lines is Atlanta Gas Light. Lots of actual gas lights still in folks front yards around here, too. They're pretty.)
You pick the supplier and billing, but there are no roving tanks or even salesfolk. Just postal mail.
Propane tends to be in standard tanks you can swap out at any gas station. Fee is reduced for a trade - the metal canister costs something, it seems.
// @jws