When I was working as a physics instructor at Rutgers University, teaching "pre-meds", one of the female students (who's now a qualified medical doctor) offered to have sex with me in exchange for giving her an A grade at the class. I refused this offer. I did my level best to mark everyone in my classes fairly, and, ironically, in the end she actually got a B+, and I think she could probably easily have got an A with a bit more effort, surely less effort, or at least less of her time, and less risk than having sex with someone she barely knew.
We were told in our teaching introduction classes that it was quite common for sexual relationships to form between the teaching assistants and the students, and that this had been an endless source of problems in previous years, and to scrupulously avoid these kinds of relationships. In my limited experience, there seemed to be any number of other women like the above-mentioned student around, using their looks or bodies to get ahead.
Surely we know that there is much more to the Harvey Weinstein case than we've been told about, in terms of transactional sex from actresses in exchange for parts. Perhaps I'm cynical but after my experiences at Rutgers I wonder what the full story is here.