yeah thats true Ed. Still if we just consider the number of sales in a unit time then which site sells more images of a contributor. As i said earlier if we ignore amount of income or selection procedure,quality etc. Then simply which site sells more images (of a single contributor per day o month or any other unit time).
I'm not sure how many (given the exclusive contracts mentioned above) people have the same number of images at all three. Some images from Corbis sell at Alamy. I think I read somewhere recently (on msg?) that some Getty pics are being sold on Corbis.
To be remotely meaningful, you'd need to know how many images someone had on each agency, how long they'd been up for and what sort of images were selling on each.
