They’re integrating with Airlines’ booking systems directly. This will work until you become so big that the airlines feel threatened by you, at which point the

They’re integrating with Airlines’ booking systems directly. This will work until you become so big that the airlines feel threatened by you, at which point they’ll cut the API access and implement whatever idea you were working on. That’s how my bank operates! You can use our API but we reserve the right to shut off access at any time for any reason. Oh look, your customers love this feature you just added? Gee, we need to close your API access for reasons. Oh look we just added this great new feature to our app, don’t you love it?