i would also like to know this.

I've spent a lot of time in Korea on business and have a little bit of understanding as to the cultural implications.  

These girls typically rely on geography to keep the two halves of their lives separate.  They come to the US for anonymity and it allows them to maintain whatever image they desire with family and friends back home, while still making relatively easy money as a sex worker in the US.  The stakes are high too, because in Korea their ability to marry a good guy and have a family is still the key to a good future- and that future would be jeopardized if the girl was known to be a sex worker since the groom and his family would not consider her an acceptable wife.  

So "nice girls" come to the US to do what they can't do at home.  As a result, what most K-girls don't want to have happen is for those two worlds to somehow come together and a photograph is an easy way for that to happen.  There could be exceptions, of course, like a girl that doesn't have any family to worry about.  But most of them want to remain well under the radar.

That faces are blurred in ad photos should send you a message. These ladies might be adventures on the job but you'd be surprised how shy and low key even  the wildest of these ladies  are in their private lives.

While  I have innocent snap shots during off work hours rendezvous I have never videod any of them or took pictures in their work pad, not even the ones  whom I have known for ages and see on a regular basis. I do not wish to make them feel taken advantage off or compromised at a time when they like to keep their profession secret to the extent they do not like being introduced in social gatherings because they neither want to lie about or talk about their job.

Most likely not.  I have a couple of gals that I've known for a LOOOOOONG time that have let me take pics (non action) but even then they really don't want to show their face.  Too risky for them.  You can ask, but you'll most likely get shut down.

very unlikely!

Throughout all these years of hobbying, only 3 K-girls allowed taking personal pictures. Of course, it was after thousands of dollars were wasted on each of them and then, we have more than a close rapport. Was it worth it? Did I get laid for free? Hell no, not a chance! These K-girls are extra-sensitive about taking pictures. On the other hand, I had a Chinese girl who used to email me her pictures occasionally. So good luck with K-girls!