storycards are the 'related articles' previews often shown at the bottom of pages by publishers. They usually consist of a featured image, a headline and link. Author and published date information may also be shown.
Representing them as a an h-feed or list of h-entry makes sense, as the elements map exactly; in fact this was the original use case for the RSS feed, used to display headlines on the home page of Netscape.
Discussed in AMP issues, which mentions the Guardian examples.