Vrbo took shots at its rival Airbnb in a Super Bowl commercial and a cheeky billboard campaign. Airbnb challenged Vrbo's phrasing to the National Advertising Division, an independent regulator.

Starting out as an Airbnb or VRBO host isn’t overly ... Mark your rent prices moderately higher or lower than the competition ...

Airbnb and Vrbo are competitors within the short-term ... that address existing and emerging industry issues, promote fair competition for businesses, and a better experience for consumers.

The ordinance would require short-term rentals, such as those available on the Airbnb and Vrbo platforms, to register with the city at a cost of $275, and it would provide criteria for revocation ...