Agreed!
Straight men also hire!
Some gentlemen sometimes want to have a quality experience without the drama of dating and whenever they're free. The same happens to ladies who want to have fun in a discreet way whenever they have time.
A San Francisco escort once told me: "Whether you're paying dinner or spending time at a bar, online, etc. you're already exchanging time for sex. Why not just get to the point and call someone?"