The Google AMP CDN is provided as a "convenience" to publishers, but publishers can ask Google to link instead to their own CDN. I think because the project is

The Google AMP CDN is provided as a "convenience" to publishers, but publishers can ask Google to link instead to their own CDN. I think because the project is early, right now this can only be done via a manual request to Google. But it's going to be required downstream for publishers to synchronize their visitor data appropriately, recognize subscribers, and serve ads. (disclosure: my company, Parse.ly, is an analytics launch partner for AMP.)