So criticism of Google, Facebook or Groupon is ok on HN. But criticism of a no named startup is not ok on HN. And it was not a criticism of that startup but it

So criticism of Google, Facebook or Groupon is ok on HN. But criticism of a no named startup is not ok on HN. And it was not a criticism of that startup but it was just of the wordings in their job ad. What kind of censorship is this? On top of that there is no explanation of why the post was deleted. Land of the free? I don't think so.