My number is different depending on what the person asking the questions means by "sex". It can be quite low, if we're only talking PiV/PiA sex, or well into the double digits if the question includes other activities.
I wish that getting something for having sex didn't have the negative feel to it. People get paid to do a lot of things- teach, clean, cook, build...why is it so bad to get paid to have sex? Manipulation to get sex or to get payment would be bad, but a business transaction of buying/selling a service? How is that so different from paying my massage therapist? I actually prefer "whore" over "slut", in general, because to me "slut" implies that one is not using any sort of criteria to select partners, but just screwing anyone possible.
Pan Female, Hinge in a V between my mono (straight) husband, Monochrome and my poly (pan) partner, ThatGuyInBlack