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.

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.

While Airbnb is doing the right thing by showing ... However, online travel agency Vrbo shows the nightly rate and total price before taxes up front, and Booking.com displays the total price ...