Tldr; The reason it dropped off the first page was likely due to mass flagging. Whether these flags were coordinated at the behest of a self-interested party is unclear. However, when cases like this are reported, more often than not, it turns out to be a function of genuine flagging.
I'm concerned that what we're observing is a result of external manipulation at the behest of self-interested parties.
Here's evidence of this concern: https://hnrankings.info/43004889/
It's currently #48 on the HN front page list.
Personally I don't use that anymore and use the algoria top results for the past 24 hours which is not affected by mods, flagging and the like.
https://hn.algolia.com/?q=&query=&sort=byPopularity&prefix&p...
It's #3 on that.
I'm surprised too, as this is extremely pertinent to Y-Combinator and the community at-large. Seems like something that would be stuck #1 spot for a few hours but that's up to the community to decide. Maybe we're all moving on from the OpenAI hype thing.