For me, I came to HN for:
* A free, online location where people can exchange ideas and commentary relevant to tech startups, that welcomes newcomers and experienced alike.
Perhaps it's different for others:
* A place to collect points to boost one's ego and sense of self-worth in front of peers.
* A paid site for members of a small community to exchange topics in a way closed to outsiders
* A place for those who have earned a role as experts or taste-makers to evaluate and/or judge the ideas of others.
Looks like there's no consensus, hence the reason for HN's decline.