Well smart..., even women understand the concept of demand and supply; being a whore with basic social skills requires no Mensa-like intelligence.
What is more fascinating to me, why do rich & successful men lower themselves this way?
Because many are surrounded by shallow folks 24/7 and rather prefer to be betrayed in a clear cut fashion than the pseudo romance. They also identify themselves via their riches and so only a truly worldly whore is in question.
On top of that many get wealthy when they are too old to score good ass - a 50+ year old man, non Groink model, who wants to bed a 20 year old is delusional. Many rich, older, man out there who are in need of companionship...
...a good time to up the dose and put on a designer bunny suit - given you're into fitness.