One of the problems here is that when users click on a search result (marked AMP in Google's SERPs), they expect to visit a website. Instead, they visit a cache

One of the problems here is that when users click on a search result (marked AMP in Google's SERPs), they expect to visit a website. Instead, they visit a cached version of the page, on Google's site. This is deceiving. If Google's going to cache the page, then there should be a "cache" link so the user knows that they're clicking on a cached version of the page. Otherwise, deliver the user to the site that they think they're clicking on.