So far as I understand workings, that may be true in a strict sense, but algorithms and various site affordances can be at play. HN specifically
penalises certain sites, and possibly keywords or themes.[1] And there are algorithms such as the flamewar detector which can kick in for specific threads.[2]
Much as a subsidy may be seen as an inverted penalty, an inverted penalty is a promotion.
That's a niggling argument, but in the interests of fairness and transparency, possibly worth noting.
There's also the 2nd chance queue, as noted in this thread here: https://news.ycombinator.com/item?id=40069963>. Though that's a manual, and not automated or algorithmic, adjustment.
I'll also note that this Mostly Seems to Improve Overall Site Quality, and I'm not criticising the practice, but clarifying it.
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Notes:
1. See, e.g., https://news.ycombinator.com/item?id=10448419> and https://news.ycombinator.com/item?id=34850588>.
2. See, e.g., https://news.ycombinator.com/item?id=8461596> and https://news.ycombinator.com/item?id=39236061>.