Guys, for me BigStock is #5. After SS, IS, DT and SX.
I tell you the story. I am working in IT, but not real programmer. I have got a task to develop small firefox add-on, not for microstocks. So this add-on for BigStock was my 'hello world' experiment with technique for firefox extensions.
Probably, but I am not sure . I will continue my work on this add-on, add more sites and functionality.

I would like to show you an easy Firefox extension that grabbing some statistics from BigStock and shows it in statusbar of your browser. Here it is: http://stockphotosoft.com/bigstockphoto-statistics-firefox-extension.

For me it works.