If there are other comments that broke the site guidelines that didn't get moderated, most likely we just didn't see them. We don't come close to seeing everything that gets posted here. Past explanations here in case they're useful:

https://hn.algolia.com/?dateRange=all&page=0&prefix=false&qu...

95% of HN comments are unsubstantive, so that was never the actual rule applied. It's probably -

"Please don't fulminate. Please don't sneer, including at the rest of the community."

Saying it's unsubstantive is nicer.

It was a substantive comment. It made a statement of fact that contradicted the articles title.

That allowed someone to reply with another substantive fact "Bitcoin addresses hasn't grown for 2 years" with link

Which I would not agree is exactly a correct summary of the data, but it's worth looking at and has create a thread far better than most of the others - https://studio.glassnode.com/metrics?a=BTC&m=addresses.Activ...