I received this information from one of the darling Preemptive Love Coalition folks:
“Oh, and by the way - the ice cream truck jingle? It's actually the gas man. Yep, trucks roam the streets everyday selling propane gas can refills. They used to bang the cans with a metal stick until the city got tired of that, and now they use the "ice cream truck" jingle.”
Oh. I see. Definitely an improvement. Big time.
Thank you for the clarification Michelle!