It was a joke, when Curtis was dis-invited from speaking at a conference due to writings he made as Moldbug, the argument he made was that the Moldbug persona and the Urbit developer Curtis Yarvin are separate so there was no problem or worry about Curtis saying wacky racist things during his presentation about Urbit, because the person that says wacky racist things was Moldbug, who was not invited, therefore would not be coming.