What if we specify as an open standard (in protocol) a client proxy service, such that nothing about it ever ties a client to a particular one. All they do is offload the fetching work. If you suspect they aren't serving you correctly you point your client to a different one. As long as there is no friction involved in switching away from a proxy that is censoring, I don't think there would be a drive for them to aggregate into a single service. You wouldn't be switching apps, you'd be pointing your app elsewhere.