Sales numbers are not something that I often discuss here at The Revolution.  I like to judge the quality (or lack thereof) of a story based on the story itself and not whether it is "popular" or posts large sales numbers.  However, sales numbers are vitally important in terms of the health and growth of the comic industry that we all love so much.  So, I always keep track of the monthly sales charts in order to track the general health of the comic industry as well as to learn which titles are popular or not.  I have to be be able to prepare myself when one of my favorite titles is in danger of getting cancelled.  And this is often for me since most of my favorite titles are ones that do not post high sales numbers.