I think the social barrier to entry is extremely high so supply is not going to going to rise very quickly. The rich clientele here are looking for very attractive women who may have some college-education. In that group of people (and really any group) there is still a lot of stigma with this sort of thing. It can ruin relationships with friends and parents. It can also ruin prospects with long term partners. Not everyone would be willing to pay that price.

I'm sure prices will be driven down as stuff like this becomes more accepted but I doubt it will be driven down to subsistence levels. Sex work is not for everyone, even if it is more socially acceptable.