Hello guys. I used to submit photos to the microstock websites before, but stopped doing so for many months, probably submitting an image or two once in a while. However, I want to get much of my photography collection submitted to the sites now. I sent two photos to shutterstock, preparing them to pretty high standards, but they were rejected (one on the basis of noise, another because the photo was of a skyline with logos and was rejected as not being editorial.) Now, I'm kinda confused as to what currently are the standards now for microstock photography, since I went to Istockphoto and I examined some of the photos that were sent as late as last year and I found quite a bunch of noise in photos at 100%!

I would like to know what currently are the standards of microstock websites like Istockphoto, Shutterstock, Dreamstime, etc.... and tolerance levels for such, if you can describe please or show examples (especially for things like noise, chromatic abberation, signs and logos, sharpness level, and gradient banding) . Also, what are shutterstock's standards currently for accepting editorial photos? Thanks.