Earlier quoted context omitted.
Google by definition wants to cover-up the domain name that serves amp web pages. Over half of the article discusses that. For your question about fastly, I already answered that in the comment you replied. The fastly CDN requires that the DNS is configured to point at fastly servers. Take a look at https://docs.fastly.com/en/guides/sign-up-and-create-your-fi... under "Start serving traffic through Fastly". Once you’…
Users don't see DNS records. In the old world they click on a nytimes.com link and get something served from a Fastly server, but in the future AMP world they click on nytimes.com and get it served from a Google server. It isn't different.
AMP requires that you consume other Google products, which requires that additional JS is loaded. When your mobile site doesn't use AMP, Google limits SEO rankings your mobile site can have. Google AMP requires your pages meet Google's Content Policies or they won't host them.
AMP and CDN delivered pages are architected differently and Google imposes restrictions and requirements that don't exist in a CDN.