Men who pay for sex already have exactly what they want, so they are in a good mood about it and are happy to deal out the compliments. Also, they want nothing more from us so no need to play games or piss about. Real life dating comes with all kinds of weird emotional baggage and people can be cold and offish to protect themselves emotionally whilst they figure out what's what. People play games etc
I mean, its pretty easy as a woman if you are even semi-attractive to get 'looks' in the street, but if you want dates or sex you have to be proactive, dating apps/nightclubs etc. Indeed, when we get clients, they are guys who particularly like us; when we actually date we will encounter rejection, because even if we are pretty, we'll never be everyone's cuppa tea etc