In my experience, many of those girls know what this is all about.
I will not pay before I meet someone. I will not waste my time on a girl who says she "will not" have a sexual arrangement. However, the girls who want to meet and see where things go, I am not opposed to small gifts. I will often reply that we will meet up, I will pay for dinner, and we will see where it goes from there. Many will have sex first visit, but just want to convince themselves it was their decision. If not, if she is especially hot, I may give $50 max and tell her I look forward to seeing where things go from there.
If the girl wants a specific commitment from you before meeting (x amount of dollars) and does not want to give any specific commitment in return, she is probably a scammer / time waster.
