One measure of success in stock photography is the number of images with a sale - unique sales. While revenue wise it may actually be better to have 1 of out 100 images selling 100 times over, there is some satisfaction knowing that the images you are spending time on and uploading are actually being purchased. Of the 1,800 images I have online, some 1,038 have sold at least once. I think that is pretty good - over half have sold... One thing I've noticed lately is that I actually sell images for the first time quite often. For example, just yesterday here are images I've sold for the first time:
This one I've had online since July 2009 - which goes to show you time helps sales:
Many of these were just recently uploaded, but of note is that I've sold more first time files in a day than uploaded (average). That should hopefully take things to new levels - literally on Dreamstime...
3 hours ago