At the end of the day, every service stands free to support whatever it thinks is the best option to go for. Eventually they will find out that they have done the wrong thing, but that will take some time for them to realize.
It will require their service to enjoy less usage in order to feel the pain, and that's something already being in process. This service is slowly but surely drying out, and the only entity that can be blamed for this is Xapo itself.