It is a forum, like UKP, for escorts and punters to interact. UKP is for the benefit of the punter so escorts can only post if it is sensible and informative to the punter rather than selling services or self promotion. UKE escorts are allowed to advertise, post pictures, flirt and chat with the punters. It is kind of the middle ground between UKP and Saafe.
I would say, sign up, take a look and decide if you want to interact. Girls AW accounts are on their profile page and you can message them on UKE directly. Just don't post reviews or ask for recommendations on there, that is a UKP only thing.
Hope that helps.