No idea. One such account's posted 24 articles in the last two weeks, most from either nytimes.com, theguardian.com, or newyorker.com. Half of them are unrelated to tech.

They averaged 14 karma per post, but most of that (218) is in one NYT share that hit.

That's right on the norm for this account. The prior two weeks of spam had one hit in 26 (Guardian, 500+ karma). The prior two weeks of spam had one hit in 30 (London Review of Books, on the Iran war, 100+ points before getting flagged). The prior two weeks, one hit in 15 (Guardian, 81 points, a dupe of an earlier submission).