I'm sure there are some women out there who have their face blurred that will still give out face pics to clients, and if they are okay with that then great. What I have a hard time understanding is why even bother blurring your face out to begin with if you're going to be sending non-blurred pics to various men?
Regardless if you've met the bloke or not, it's a trust issue. What if the provider meets a bloke, decides he was normal enough so she sends him a face pic, then months down the road he becomes a crazy stalker, or angry with her and decides to go plaster the pictures all over the internet? So why even chance it? I haven't always shown my face, and when I did have my photos blurred and a bloke asked me for a face picture, I would tell him to fuck off and that was the end of it.
Bottom line- If a provider blurs her face out, it's probably for a reason. It's silly to presume that simply because you may have had a good session with a lady that she should be so quick to give you something as personal as a picture. Discretion goes both ways...