Came across this well-written and quite insightful escort tell all ostensibly written by a former high end Manhattan escort from Belarus. If you're to believe her story, she sort of fell into the sex trade and through trial and error, developed both the skills necessary to command a high end rate, but also the marketing know how to earn quite a lot in a short time frame. She reveals a lot of her business secrets in the article, which I found quite interesting and answered all sorts of questions I've had over the years.
https://medium.com/matter/sex-is-sex-but-money-is-money-e7c10091713f
https://medium.com/matter/sex-is-sex-but-money-is-money-e7c10091713f