http://www.shutterstock.com/pic-9430288-green-stalk-and-earth-earth-image-courtesy-of-nasa-blue-marble-mission-apollo.html

Strangely, at least I think it strange, I have never had a single image hit 100 downloads on SS, but I have had several pass that mark on IS.  Same images on both sites.  One on IS pushing 200, but the same on SS is only at 25.  Anyone else have this pattern?