This seems like the kind of thing that will be labeled (maybe rightly, maybe falsely) as a "mistake" and fixed... It really seems like if this AMP proxy stuff is going to get forced down our throats, then viewing the original version needs to be integrated at the protocol level and exposed out through the browser UI, not the website (which would also make it possible for non-Google browsers to opt out, as an extra bonus). Otherwise, this sort of thing is just going to keep on happening.