But why? AMP allows other advertisers. They can track clicks just as easily with a redirect. They could quite easily change the UI of the Android browser to all

But why? AMP allows other advertisers. They can track clicks just as easily with a redirect. They could quite easily change the UI of the Android browser to allow for fast switching through search results. Nobody cares what CDN the bytes are served from if the content is identical. I agree that it's somehow yucky, but I don't see how it can be ascribed to malice intent, instead of an effort to improve the user experience that maybe goes too far.