Indeed. I'm a bit surprised that this company is 'savvy' enough to post to and 'engage' with Hacker News, and yet not smart enough to realize that being so blatantly obvious in posting fake comments is a surefire way to attract the disapproval of that same community.
Or am I underestimating how mainstream HN has become?
(of course there's still the possibility that these comments are actually genuine, however unlikely. In that case my apologies for making the wrong assumptions.)