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Re:Ask HN: How does post banning work on HN? by brudgers on Monday September 18, 2017 @06:47PM (#15280371)
The knowledgeable answers can only come from the moderators. Try using the |contact| link at the bottom of the page.
Re:Ask HN: How does post banning work on HN? by grzm on Monday September 18, 2017 @06:58PM (#15280428)
You might find the guidelines and FAQ useful as well:

* https://news.ycombinator.com/newsguidelines.html

* https://news.ycombinator.com/newsfaq.html

The FAQ includes information about ranking and flagging:

> How are stories ranked?

> The basic algorithm divides points by a power of the time since a story was submitted. Comments in comment threads are ranked the same way.

> Other factors affecting rank include user flags, anti-abuse software, software which downweights overheated discussions, and moderator intervention.

Also, the guidelines request (as 'brudgers points out):

> Please don't post on HN to ask or tell us something. Instead, please send it to [email protected].

I'd speculate that it was just the normal churn. 'dang and 'sctb have commented many times that they specifically take care on posts that reference YC in some way.