you don't have to be convinced. lots of people doing lots of thing exists that you don't know about.

I've also had women of this ilk ask me to be part of their male sex harem and flip out telling me i'm a horrible asshole when I politely declined. i doubt you ever encountered that while you were dating either and you are free to assume that is also a fabrication/lie.

but also I doubt think you are in the same circles I am. But there are plenty of New Yorker and NYT times articles about these people, because they tend to only exist in a few select cities in a few neighborhoods in those cities, and they are often the same class of folks who dominate the media industry. These are the people who 'network' their toddlers and infants and whose marriages have performance bonuses tied to their spousal duty targets. They very much exist and they have turned relationships into business arrangements.

https://www.nytimes.com/2015/05/17/opinion/sunday/poor-little-rich-women.html