I am entirely against a public "Top Ten" list of any kind ... my reasons have been state above by others so, I won't repeat them.  We have plenty of tools for stats.  The only ranking that should really count is the one with your customers, not how you stack up against your fellow GCU contributors.  Personally, I don't like seeing GCU artists eyeballing each other as competitors.  It fosters too much negativity for my taste.  Yes, we're all here competing for the same traffic, but if you analyze the stats, you'll see that the marketplace is broad enough for all genres and niches.  Successful entrepeneurs understand that when the markeplace as a whole is doing well, their profits are bound to increase.  
 
I think Corrie and Ernestine hit the nail right on the head ... don't worry about what others are doing (unless they're doing your stuff!).  Just concentrate on designing cards that you like or think will sell well with a certain audience.  
 
Private rankings are equally irrelevant to me ... how my cards rank with customers is the most important stat to me.  Every card that sells well tells me what I'm doing right ... the cards that sit, they tell me what I'm doing wrong.  That's all the stats or recognition I need.