Many years ago when I left good feedback on AdultWork for prossies it was to help my fellow punters, this '
keeping a gem to myself' is not something I do. I first knew other punters thought this way only after a prossie told me so during a punt, it being his reason for not leaving her feedback. If a prossie had zero feedback and turned out to be genuine and good punt, I would quickly leave her feedback to notify all those considering her that she was genuine not fake and to go ahead booking her.
This was the 2007-2009 days before UKPunting.
If I was still in the UK now I would post reviews regardless if anyone was "leeching" of my reviews and info and giving me nothing back, if they had a good punt then I'd be pleased to have helped a fellow punter.
So a prossie gets popular after I leave her raving feedback and I struggle to see her again because she's fully booked up, the fact I helped my fellow punters is more important than me being affected.
I run another site that is unrelated to sex but also has review system, and again it's the same as UKP, only a fraction of visitors to the site are ones who post, there is a Wikipedia page dedicated to this topic:
External Link/Members OnlyAnd not forgetting this is a free site, I spend my time and effort to maintain it, and get nothing in return apart from the satisfaction that I'm helping other punters to share info, which is more important than some dirty money I could make from letting prossies and agency pimps advertise. If everyone was always wanting something in return, then UKP wouldn't be here as it is, instead it will be some website owners who wants to make as much money as possible.