It's fucking stupid.
It's not a dating site, these girls are getting paid - I mean come on
OK I know that if your email comes across as annoying or rude or whatever they have the right not to reply to you and can choose their clients, that's fair enough. However, I always start by telling them they look gorgeous, i like their profile, I have a photo and decent feedback so they can see I'm not an ugly cunt, I politely ask about their services, it's always a nice, well thought out and polite email......and most times they read it and ignore it
I will say this, last time I was living in Scotland was for a short time between 2011 and 2012 and I ALWAYS got replies, even if I wanted something like COF or whatever and managed to ask them in a joking polite way with which they felt comfortable with I would always get a reply, and 90% of the time a booking. And they were decent punts too - the quality on Adultwork now is fucking shite. Hands down pish.