LWN has a cool feature where any subscriber can make these "subscriber links" to share an article with a friend/coworker, a relevant mailing list, or sometimes

LWN has a cool feature where any subscriber can make these "subscriber links" to share an article with a friend/coworker, a relevant mailing list, or sometimes even HN. See https://lwn.net/op/FAQ.lwn#slinks https://lwn.net/op/FAQ.lwn#slinks for details. In this case, the link was posted by Jon Corbet, who is LWN's main editor and developer.