Reward users for browsing "New" This is an interesting suggestion. I think of looking at new submissions as a kind of "service to the community"-- more specifically, to the community I want HN to be. If the front page is filled with links I don't value, then it's partly my fault if I've failed to upvote submissions I would rather see on the front page (this, of course, means browsing "new" is a reward unto itself, bu…
I'm someone else who refrains from commenting in order to protect my average karma. The thing is, that it isn't as irrational as you are making it out to be. Posts from users with higher average karma are sorted higher. Presumably you are posting because you want your post to be read. Either you want it to influence people or you want your question answered, or whatever. If you didn't want it to be read, you wouldn't…
But you actively try to protect your karma? After my karma hit 1000 I basically stopped caring anymore. What incentive do you have to protect your karma (serious question, I'm not sure I understand why it matters)?