In might be consensual in the sense that everyone said yes, but there’s a known balance of power. Sounds like coercion and naivety.
How do you know these women don’t genuinely want casual sex with rich, powerful men?
Drugs, alcohol, and whores are cheap compared to the value you can extract from people using them. This article was fun to read; there have been lots of hit pieces coming out this year on SV, can't say it's undeserved either. Nothing here is shocking or unexpected, pederasty would be shocking -- no names which takes a whole lot of fun out of it for the spectators.
Sounds like they are explained the situation when they get invited.
But it also sounds like there is no way to back out or participate without repercussions leaking into their normal lives. Not exactly fair.