The HN mods routinely give posts they feel are interesting a second chance [0], and posts deemed "controversial" via a combination of human and automated factors are deranked.

HN has more active, hands on moderation than most social media sites, and there's a stronger argument that dang "endorses" the front page of HN than that Steve Huffman "endorses" the front page of reddit.

[0]: https://news.ycombinator.com/item?id=23239449