Hmm, that's just "another link from someone who uses HN as a bookmark service". User started this self-service at the end of last year. With now 60+ submissions in the last two weeks. We can expect more interesting topics.

Site guidelines don’t seem to forbid this, but might be against the spirit of the guidelines? If so, could be worth a report to hn@ycombinator.com?

Yep, zero interactions, just dumpling links.