The app is their business, erm, core value proposition. They earn their money by claiming to be better at getting a property owner money than anybody else, and

The app is their business, erm, core value proposition. They earn their money by claiming to be better at getting a property owner money than anybody else, and getting a tourist a better accommodation. To avoid the latter choosing a hotel (God forbid!), they need all the flashy, infinite-scrolling goodness a native app can offer to get the buyer to stay on their app as long as possible. That app is their life line.