When you start a thread here, if you choose to submit a "link post," a thumbnail of the top image of the webpage usually appears by the post title, but I noticed that sometimes there is no thumbnail when the post is started with a link, which probably happens when the article has no image files or, maybe, when it uses a hotlink to display an image.
A post linked to an archive.is page should also display at least a thumbnail image here too.
Back on Reddit, with the Reddit Enhancement Suite (RES), you could easily get both.
When you archive an article on archive.is, it captures the article and generates a "screenshot" of the first part of the article.
If you linked to the archive, RES would display the screenshot for you. No need to click through to the article unless you wanted to read all of it.
When you start a thread here, if you choose to submit a "link post," a thumbnail of the top image of the webpage usually appears by the post title, but I noticed that sometimes there is no thumbnail when the post is started with a link, which probably happens when the article has no image files or, maybe, when it uses a hotlink to display an image.
A post linked to an archive.is page should also display at least a thumbnail image here too.