It's a new account that has only spammed the site with submissions from this one domain that no one else has ever submitted. This, along with it being slop, is becoming the default submission profile.
Yes, I have registered on HN exactly for the purpose of sharing and responding to one of the articles. For full disclosure the blog author is a former coworker and I read his blog frequently. To some articles I want to respond and I think HN discussions are the best platform for this.