I see three submissions of this post. This is the only one to get any discussion. All submissions were submitted by different people. All three submitters submit from a range of different sources.
Even this search shows a variety of submitters, with only a couple of substantial discussions.
The submitter had a moderately successful post from this domain a couple days ago and probably thought people might find a follow-up interesting. That's not an ad.
Even this search shows a variety of submitters, with only a couple of substantial discussions.
https://hn.algolia.com/?query=Good%20sleep,%20good%20learnin...
But if you think there's something wrong with this article, or domain, or the people submitting it, you should probably email the mods.