I’m not against those who work for sex, but the idea to earn for a living doesn’t seem nice. IMO, sex should be for 2 people (or more for others who prefer polyamory) who wants to be intimate/romantic with each other. My point is money should not be the purpose.
I have no stake in anything sex related, but I’ve known others which can be described as insatiable. If they are willing and able to do that for of work, then what’s the harm?