"As shown in Figure 11, Travelocity alters hotel search results for users who browse from iOS devices." (In particular, alters the prices shown to the user).
I was shopping for flights last Christmas and got price X on every site. I started checking out and the price became X+50. I got angry and left and came back later to find the price, on all sites, was X+80. Since I had no choice but to travel I paid X+80. Then for kicks and self torture I checked the price on my Android phone and it was still around X.
Jacking up prices when revisiting the site from the same browser is a separate thing. It’s there to encourage you to buy ASAP as prices appear to be increasing rapidly.
