So I should vote only the first submitter and to do so hunt down all the instances of the article posted before, to find out who was the first ? And that'd be the value in karma -- who submits first ? Sure, it'd make at least more sense than it does now, which is randomly giving hundreds of karma points to anyone.

Still wrong in my view, and worth giving more value to comments. I've already commented anyway, not sure why HN does not automatically register the first time a link is submitted and redirect the rest to the first one.