I feel there are three other value-reward systems in effect: 1) If I post links that I think people will find interesting, they will feel more inclined to shar

I feel there are three other value-reward systems in effect: 1) If I post links that I think people will find interesting, they will feel more inclined to share links they feel interesting: most of us have an innate sense of quid pro quo. 2) If I post links and they are voted up, others will recognize that as an interesting subject and post other links on the same subject, providing me with information I wouldn't see otherwise 3) If I post a link, people will comment on the story and provide valuable insights/feedback, helping me to determine the value of the link.