It's user flags (they affect ranking) - apparently there is a clique of users which flagged each Musk/Twitter story.
See also this discussion: https://news.ycombinator.com/item?id=33366830
See also this discussion: https://news.ycombinator.com/item?id=33366830
And thanks for that (indeed, flagged) link too -- glad I'm not the only one who noticed the glaring absence of this story.
https://news.ycombinator.com/newsfaq.html
> How are stories ranked?
> The basic algorithm divides points by a power of the time since a story was submitted. Comments in threads are ranked the same way.
> Other factors affecting rank include user flags, anti-abuse software, software which demotes overheated discussions, account or site weighting, and moderator action.
And people don't usually read the FAQ to double-check that basic forum features work in the intuitive way. :)