Could you (and others) elaborate a little more? Are you a reseller for for a large number of titles? Are you a generic site or a very focused topic specific site(s)? Are your materials self produced or exclusive?
I am interested because I am looking for different monetization models for my GF who is a fine art painter and photographer.
I plan on writing up some thoughts about this in a series of blog posts over the summer. However, maybe I should make it a paid e-book? I kid, I kid... maybe.