Lighten up. The obviously bad idea of offering potential dates a cash reward is what makes this joke funny because in the context of running a Facebook ad campaign discounts and promotions are quite common.

What assumptions are you making about the industry I work in? edit: And the gender of the person adversiting..

Prostitution works both ways in 21st century. Given how women sex tourism is rising, I wonder wether men or women have less against prostitution these days...