[richardw]

The problem is, once you start that on HN you'll have yet another reason for overposters to post every vaguely relevant special they see. I didn't mind that the poster did it (so bought via the referral) but it'd be sad if this caught on, and I wouldn't post a link with a referral myself. The benefits around here are karma, mutual respect and increased collective wisdom. Let's not find ways to dilute those further.

[rodly]

I agree that this is a potential problem but it is easily solved by the voting system. Low-quality submissions don't get much karma.