First of all, by asking your question here, it seems you missed the following in the HN site guidelines: https://news.ycombinator.com/newsguidelines.html https

First of all, by asking your question here, it seems you missed the following in the HN site guidelines: https://news.ycombinator.com/newsguidelines.html https://news.ycombinator.com/newsguidelines.html >"Please don't post on HN to ask or tell us something (e.g. to ask us questions about Y Combinator, or to ask or complain about moderation). If you want to say something to us, please send it to hn@ycombinator.com." To answer your question, some sites have a history poor quality articles (i.e. usually webspam regurgitation articles with a few rare exceptions of good articles mixed in), and some sites are regularly abused but also have worthwhile content (submitting off topic videos from youtube to drive up stats by spamming news aggregation sites like HN is a constant and infamous problem). To prevent abuse, new HN accounts are unable to submit URLs from the lightweight and problematic sites.