I would find it extremely helpful if, within each review, it was stated how much the hobbyist paid for that particular session.

Although some providers have prices listed it is at their discretion what they charge. Also some hobbyist may not be so truthful about what they actually pay.

should be included in each review. Especially useful for those providers who upsell.  That way we know what we're going to have to pay if we decide to use them

Different rates for different cities
Different rates for different time spent
Different rates for Fetishes,etc.

traveling a lot I notice after a day or two things slow way down, I figure it is my rates.

I strongly agree that TER should add such a  feature. I just posted some suggestions this evening to this forum where I mentioned just such an idea.

About two months ago, I had a very serious problem with tipping / upselling from a very attractive girl whom has been around for a while. I called her based on her photos and on reviews which had been posted to TER, but NOBODY had ever said anything about this provider being a big time upseller. I was blown off my rocker when she told me that she wanted another $200 for full service! I then proceeded to report this problem to TER and asked them to correct the prices which this provider was asking for, but it there is no doubt  in my mind that a lot of guys got hammered by this girl before something was done about it.