This reads like a PR piece with some weird metrics: "AirBnB spending" and "based on a panel of spending data including more than 65,000 Airbnb transactions". What is that? The Y-axis is an index, not a metric with units. And why compare to one hotel chain? The linked analysis is not better, although it compares to 3 hotel chains. I am not sure that AirBnB's main competition is business hotels like Merriot, Hilton and Intercontinental, though.

Just tell us the revenues. Are they up or down? Bookings?