I have found that most escorts do not use the email system on their profiles , however you will get a reply using a PM providing the questions asked are not already covered in their profiles - so if the profile says FK you might not get a reply to a question " do you do fk ", so unless you have met the escort keep it short and sweet
" are you going to be in dublin anytime soon ?" should get a reply
" what hotel do you stay in when in dublin ? " needless to say will be ignored