In 2009 I started to use iStockcharts
to track about 196 of the top 250 sellers on iStockphoto. While figures for the other 54 of the 250 contributors were available, their names were not. Consequently I left them out of my research. iStock has over 100,000 contributors, but it is believed that well over 90% of the images in the collection and well over 90% of the total downloads belong to the 37,085 contributors whose information is available on iStockcharts.