I think it's mnore complicated than that, Glasgow Man. Some of us read the reviews for the negatives, not the positives or for enjoyment. Both of the OP's review of the same girl make her a 'negative' for me, though I could easily have missed it. If she had 5 reviews, all longish and all positive, or mostly positive, with the "forties" detail hidden 3/4 of the way down the text, it would be easy to miss when having to search through several profiles in order to make a booking. So I think there is a point to the custom (not a rule) of only one review for each p4p by each reviewer – unless there's been a big space of time or (for instance) her services have suddenly deteriorated.
Biut it's a general observation, and going on about it too much esepcially when the OP was new and obviously doing his best, well I think that could be unnecessarily disheartening. It's another reason why I prefer short reviews rather than Mills&Boon style, but that's a personal preference, based partly on the limited time available to read long reviews. The fact that sauna reviews are not indexed, again makes the research more time-consuming. And I hope I've made my point without going over the top or suggesting everyone else shoudl agree.