This is what I saw recently on the iStock forums as a response to the question why are my sales slow.  I asked in their forum what may be the reason the vector images I have on iStock are not selling.  I started selling there 5 weeks ago. The same images are on Shutterstock and I've made 250% more money in half the time.  I've asked for an explanation for this 3 month time period, but so far no one has replied.  Can anybody share  their insights?