In case you haven't discovered yet...
Craftcount.com shows the stores and sellers doing the best on Etsy.
Kind of interesting to explore and research!
Just had a quick look. Imagine having thousands of listings! the idea of it is exhausting :)
I KNOW! I think there is a connection though.....I have found personally that the more things I list, the more sales I have. I guess it has to do with the number of you items are bouncing around during the searches.