This this particular duplication is (in my opinion) likely because of the title - the one you linked primarily mentions Intellectual Ventures. Personally, I like it best when people use the original title of the page / piece; in this case, "When Patents Attack!".
Wow, I couldn't disagree more. "Intellectual Ventures on TAL" (the other submission) describes exactly what the link is. "When Patents Attack" communicates only that this is a link about patents.
http://news.ycombinator.com/item?id=2795743
Lots of duplication lately. Is this a way to game karma? Simply repost a popular story.