Seen today in a "Trending Moment" [1] pushed by Twitter on the Explore tab. The posts shared the same hashtag but didn't otherwise seem to be curated.

This search query brings up a handful of examples [2]:

  site:https://twitter.com/i/events/ intext:"by an algorithm"

[1] https://help.twitter.com/en/using-twitter/twitter-moments

[2] https://www.google.com/search?q=site%3Ahttps%3A%2F%2Ftwitter...