Its weird having HN submission where only a subset of HNers can make comments though. I am happy for them to have a paywall but question whether it should be kept on HN if there is no information for most people to comment on.
It is the equivalent of linking to a paid book on Amazon and having a discussion about the book's content.
Well, if 99% of the book was freely available for viewing on 9 other websites than Amazon, I bet that people would complain A LOT for being given a link to Amazon instead of one of the numerous readable sites.
I don't have cookies disabled but I do have adblock and I get the paywall, but if I open it in an incognito window it shows so I'm guessing its also triggered by ABP (or some other condition).