This is another throwback to a design from Spring 2014, and shipped in the BuzzFeed iOS app in Fall 2014.
The goal here was to design an experience for browsing the top and trending 20 posts of the moment in a digestible and gleanable way (e.g. more metadata like the dek would appear in landscape orientation).
Because the list was finite and updated periodically, this design punctuated the list with a success summary at the end of the scroll, followed by a prompt to opt into alerts about any other trending posts through push notifications.
(This prototype was originally built in Framer, then rebuilt in Principle for this recording.)