I was wondering if any of you Clickbank affiliate experts
could give me a quick run down on what these definitions are:

Popularity --

High Gravity --

Low Gravity --

% referred --

If you are shy or don't want to "spill the beans", please
shoot me a PM and help an old dude out...

I am researching products to promote, but don't know
what all of these stats mean (especially the high/low gravity).

Thanks!