Sometimes they're posted by brand-new accounts, sometimes it's "aged" accounts that have never posted before. For instance, this one created in 2021 has posted 12 times in the last 2 hours:
https://news.ycombinator.com/user?id=TheDarkLegend
(you'll need to have showdead turned on)
Is this the world's most misguided phishing attempt? AFAIK dead posts don't get picked up by any search engines etc...
mtmail•2h ago
The old accounts is amazing though. Either somebody really playing the long game or easy guessable passwords?