Yes word have meanings, often several of them. I chose the one we often use when we say ”death cult”, or ”sex cult” etc. You claim to say you know exactly what meaning the author meant, which either you have to derive from quite careful textual analysis - which you haven’t - or you have to be the author themselves. Personally think having sex is quite fine and dandy, even group sex if that’s your thing. Sex cult indeed sounds a bit ominous. I wonder why furries are never described as cult, although they are indeed very devoted. Britney Spears fan club has very strond devotees who I’m sure have sex with each other (since it is mostly gay men), but never heard of Britney Spears Sex Cult.
I wonder if it just that you try to weasel away from negative publicity by trying to flex the meaning of words to turn the meaning of this bluesky post upside down? In that case I might suggest you to tread carefully. When nothing is true, everything is possible and all that.