Better chart is this:

http://hnrankings.info/6950932,6950735/

No idea. I saw it, followed the link, and thought that while the item has some really, really bad points, it actually has some elements of truth, so I submitted it, and it survived.

It may well have been deleted by the submitter, or flagged to death - I don't know the circumstances of the demise of the previous submission. It's not clear why you talk about it being "allowed" on the front page.