...but could someone (pretty please) explain to me what this is:

On Istock site, when you go to "Upload" and then "Total uploads" - you are taken to  a page with all your images. The stats have number of columns: Image - Edit etc. The third column is the icon of a camera. What does it actually describe ?
The entry in that column is: "5.0 (1)".

(Forgot to add: finally I got accepted at Istock  )

Thanks. Now I do not know if the "5" is 5 out of 5, or 5 out of 15... 

Correction: I know now. Thanks again.

At first I thought it was only the customers and users clicking the rating stars but a couple of times I've had a 5 rating on a newly live image with 0 views. So the inspectors sometimes rate the image?

And it seems there is only highest rating.  I guess noone dare to rate low, and risking to get it back.

It's nice to be nice.

And it doesn't cost anything. And it just might make someone feel better - both the giver and the receiver of the compliment. Both sides win. Now if we can just promote this philosophy . . .