It would be nice if hacker news did not accept links to pay-walled sites
In fact, "amphtml" is the first link on the page. Follow this link to see the full article.
However the /amp URL does not retrieve comments like the URL you posted.
Personally, I prefer the amp version on mobile, and this on desktop.
You're allowed to show different content based on referrers, just not if the user-agent is googlebot.
Googlebot's referrer is google.com, so it is able to bypass the paywall, just like anyone else clicking off google.com
https://chrome.google.com/webstore/detail/bypass/ekfnpmbmfml...