Given my (rough) understanding of Justine’s political leanings (active in Occupy [1]), I think (and hope) that you are mistaken. The following searches turn up empty [2,3] as well.

[1]: https://www.thenation.com/article/archive/breaking-occupy/

[2]: https://duckduckgo.com/?q=site%3Ajustine.lol+dark

[3]: https://duckduckgo.com/?q=site%3Ajustine.lol+moldbug

It is perfectly possible that you are still right. But I would be darn careful to make statements like you made without backing them up with facts. The Internet is a chilling enough place without even more vague rumours going around.

Edit: Well, apparently your memory is on to something after all [4,5].

[4]: https://crooksandliars.com/2022/07/donald-j-moldbug-lurks-ar...

[5]: https://www.thedailybeast.com/occupying-the-throne-justine-t...