CNC = consentual non-consentual. I.e., pretending to SA as a fetish.
See the "Brangus Unchained" section of the posted writing.
Core leaders for MIRI, Lighthaven and the community fetishistically prefer simulated [SA]. They are bound together by having hobbies and secrets in common. This seems to be an important form of social tie in this group. They promote their sexual interests and recruit for their sexual events so prominently because these are the things they care about and believe in. These people are some of the most influential, if not the most influential people in AI Safety.