Combining art and commerce is not easy, but it's not impossible. Nothing goes 100% perfect, so you cannot become the perfect artist and the perfect seller together.
Now a commercial approach is this one:
Now, the doggy painting is drawn like you don't care if it's going to sell, it's drawn with passion and in a kind of childish manner. The second image is made with one purpose: to be sold. It has no personal value. Just standard buttons.. glossy.. to be attractive and a lot of them.. But it's a good work and someone will need it someday.
Now, look at both images once more. Can you find something that they have in common ?... kind'a hard huh !?.. well that's what I'm saying.. to make the alchemy will have to find that common feature.
One thing the two images have in common is 0 downloads... but just for the moment.. the "button" image was viewed more than the dog... 1 point for the selling manager.. we'll see what's going to happen later considering the images are recently added and comment on that.
Right now I'm drawing a new image. My purpose is to make this image a good mixture between the artistic concept and the commercial one. And I'm not mixing green buttons with artistic dogs on them... when it's done i'll publish it in episode III.