How do they do this?

Do what Jonathan? Can you be a bit more specific? :o) thanks

you can click other stuff under the navigations and you will see the most active members, I was wondering how they grade us on there

Its' really not a grade Jonathan, it is statistical in nature. Look at the top of the chart and you will see how the ranking goes. Comments (measured in KB), votes and uploads. This is erased approx. once a week and everyone begins at zero. That is my understanding. Anyone who has a clearer explanation might be able to help you further. Hope this helps :o)

thanks mimi it does help know : )