This isn't really news, since it's not that different from the more "socially acceptable" whoring many women already do, especially attractive ones in big cities. Many women like Amber have already spent their better years in longer-term whoring situations (which they don't like to think of as whoring, but rather "being clever"), like being a booty call or mistress to guys - especially much older guys - and then once or twice a month "collecting their draw" by batting their lashes, making puppy eyes and pillow-talking sugardaddy about all the bills that are due (credit cards/rent/car/and fictitious ones) which they "have no idea how they're going to pay... big sigh."

So, girls like Amber showing up somewhere to collect a predetermined amount of money from a stranger in exchange for spreading their legs is a situation that they're already somewhat familiar with - only diff is having to break the ice with a stranger.