If I remember correctly it took me a few tries to get accepted with iStock. Initially they took two out of three, then rejected the alternate third image, then accepted me after another go-around. I'm new to stock and had no idea how hard they were on digital artifacting, which many of us "old-timers" equate with film grain - something our clients demanded we add to an image after going digital years ago because the photo looked too "sterile." How things have changed.

Nonetheless, I got on with iStock then they rejected 11 of 15 of my images, which is were mostly due to noise/artifacts. Since i've worked to correct that and have had much better luck but IS is still a slow, slow process to build a port there.

Good luck!