I fully agree with you that that's perfectly acceptable behaviour (if you didn't know in advance that they knew [person], or else it gets a little unethical...)

I fully agree with you that that's perfectly acceptable behaviour (if you didn't know in advance that they knew [person], or else it gets a little unethical...) But from the phrasing of the OP ("great hustling"), I took it to mean that she was actively "hustling" OKCupid by using her dating profile (i.e. people's desire to sleep with her) to get business contacts (i.e. money).