I'm going to say this in a straight manner: Your stock has no use.
I knw I'm being blunt, but it's true. I'm sure you read the description of the Stock category when you submit them:
"Please realise that stock images should be of high quality and low compression. Images that are unfocused, blurry and shaken are not very suited to be used for manipulations or designs. Also, images taken in a low resolution, are neither very suited for use - since you can't size up without losing data ... using your webcam to take stock photos are not very smart or appreciated."