I'm assuming that making these links is job/career related.
On the flip side it's been interesting to observe the reservations people have for voting something of interest up. I've posted stories and made comments that generate discussion but receive no votes. It's weird that people obviously read the comment or story, find it interesting enough to generate their own comment, but don't acknowledge that with a vote.
Why wouldn't someone vote a comment of interest up if karma has no value? It's an odd part of our human psyche. The unfortunate part is that voting is the sole method a site like this has for identifying the signal through the noise yet a large portion of the community is reluctant to participate.
Consequently, when I read the articles later and find an especially worthy one, I sometimes try to page back in HN and vote it up. Frequently I don't find the story before I lose interest in the process. I could search, but a number of HN linkers have rewritten the title - a practice I know PG doesn't like, but people do it anyway - making search from the original back to HN more difficult. Lame excuses, perhaps, but I'm not likely to change my reading habits.
When one ceases using the comment system as a filtering for interesting/uninteresting or relevant news and it becomes a status symbol you have completely lost the entire purpose of the system.
In the search for points you will abuse and ruin what the system was put in place to do.
Submitting other peoples content would probably mean less to someone over time.