This should link to the original thread [1]. The important part is the attached images, which threadreaderapp doesn’t include.
Edit: That's behaviour which has changed in the past year or so.
The only reliable way for now to see a full thread is Threadreader, as submitted in this post.
From page source:
<meta property="og:site_name" content="Nitter" />
Via: <https://news.ycombinator.com/item?id=39161194>
That said ... for now, yes, that does actually show the relevant image links in context, which is helpful.
No, not if it’s on twitter