But both of them suck on their own. The real key is to say "This will be great exposure AND I'll pay".
They say "money talks, bullshit walks", but I think I still need to know that I'm working on something that has a purpose and isn't just for a personal experiment. I am sure this is frustrating from a person's point of view who is in need of art. But many artists just don't want to deal with the stresses that come with inexperience.
And it's worth noting that I am nowhere near "top tier" of any kind of art, much less concept art. If I have those kinds of feelings, I can only imagine what an "art rock star" is like.