You know, there is so much condescending going on here that I feel obliged to add one more comment:
Being a "model" does not negate a person's intellect, so if they agree to a free photo shoot and are asked to do something against their own morals, then you know what? Speak up, and refuse. It's pretty bloody simple.
Honestly people, do you really think the homogenised and watered down magazine industry here in Singapore is that sleazy. You do? Wow, I feel sorry for you.
My advice is (as in all ventures in life): go for it if you feel it's safe, and take care of yourself. Doesn't matter what job, what assignment, but if you're a pretty girl as most of the "models" on this site are, then yes, you need to add some extra degree of knowledge and nous when you go along. I do not feel Samurai is fishing for gullible women at all, and his reluctance to name to magazine is very simple -- it's business, kids. And the mag industry is very, very cut-throat so his reluctance is par for the course.
Anyway, it's an opportunity. Make your own minds up.