They did, which is the only place you can find the HoH2 paper, but they don't link to that paper from the writeup --- you have to dig into the Drive folder to get it. That's because the HoH2 paper isn't an overtly absurd paper, unlike the "Progressive Stack" paper, which they deceptively suggest got into Hypatia and which they do link to, despite it being rejected.

Their writeup is disingenuous, bordering on overtly dishonest.