I have a favorite provider and I am gonna encourage her to be more old fashioned and raise her prices. She could pull it off. I suppose it is a fine line between price and volume, and even if they love sex the providers still, IMHO, have "i want to make $X a day/week/month." I think there are a few who could go upscale, and make more $$ seeing fewer of us. I, for one, like the choice. Sometimes I want a $100 HH quick fix, but sometimes I want multi-hour, nice location, champagne, non-rushed, etc. In my limited experience, the latter is hard to find even if willing and able to pay.
I am about to see a rather expensive provider in Austin - it has been a 3 week process to verify, email, and talk (she insists you have a phone call or two before you are ok.) Including me buying brunch and ordering my favorite wine it will run $1g. But it will be nearly 5 hours of bliss. I'll let you know if it ends up being worth it. So far though, the build up has been both thorough as well as tantalizing.