Yeah the QoS stuff needs a complete rework tbf. It happens way too early in the story and affects very little. I agree that there should be some sort of persistence check for dialogue and interaction if the MC is marked.Also, I think once the MC gets her BBC fix and starts score Black and is tattooed, she should not be getting satisfied encounters with white guys as it belies her stated preference - and guys who see her tattoo/underwear and realized meaning should think something about it like no wonder she's a slut and her cunt is so loose. If she wears the BBC/QoS top publicly she should be getting random criticism and also randomly hit on by black guys, including all the scenes in the Quiz.
I know the dev reworked v0.6 (and is still redoing the original story) but imo v0.5 was a better story in terms of the MCs progression.