Model -VS- Celeb Appeal in Magazine Sales

Hey everybody. So there is a debate among the scarcity of fashion models representing fashion magazine's covers, such as Vogue, Harper's Bazaar, Elle...etc. I feel that the models belong on fashion magazine covers, and no offense to the celebs but they should stick to their movies and let the models do the campaigns. But obviously celebrities are more well known therefore generate more revenue for the magazine. All is fair in fashion & business, I suppose.

Jessica Simpson recently on the cover of Elle magazine,

...Which led to record sales for Elle magazine, considered "Elle's best-selling cover of 2007" for the past 7 years.
(http://nymag.com/daily/fashion/2008/07/elle_robs_jessica_simpson_of_h.html?mid=fashion-alert--20080731)
^The article if you feel like reading it.

...and does it take a model as well-known and controversial as Kate Moss (i love her) to finally be on an American Vogue (this August's) cover?
(image found on google via http://www.madisonmag.com.au/images/mad/StyleSecrets/kate-moss_318x411.jpg)

How do YOU feel about it?

xoxo
Karen