With all due respect, I disagree with this. I can certainly understand how useful (or at least the perception of how useful) feedback on a given companion can be, but there are simply too many variables at work for this kind of feedback to really be useful, at least in the manner many like to think they can be useful. In your post above, you even mention reading them "with a grain of salt", which tells me the content isn't really reliable but many seem to forget the salt and allow the feedback to set false expectations.
My biggest gripe with how the current system works is the guys who indicate a lackluster experience often don't include *their* contribution to the lackluster experience. "She refused to give me a {fill in the blank}, even though we agreed on it beforehand" is an example, but he neglects to mention he refused to shower and wash his junk, which smelled of who knows what which is why she refused to do it. The stories I've heard about what guys do in private really shock me.
What prompted me to post was this:
"Well then I feel that they're in the wrong business..... "
I fully understand how "client feedback" can be considered part of the "cost" of doing this business, but I've had far too many positive experiences for lack of any kind of online feedback would be considered negative.
Lastly, my intention isn't to get you to change your view/opinion/perspective. You have the right to that. I just disagree with it and nothing more.