What's going on with iTunes?

While wandering around iTunes, looking to see if my latest books had finally been uploaded (they haven't), I noticed a dearth of indie titles on the romance bestseller lists, and also among the recent releases. Now I'm wondering if iTunes has simply stopped uploading indie titles for some reason. If so, that would be unfortunate, as I made quite a lot off them last quarter. I can't quite see why they'd do that (selling books means money for them, after all), and yet I'm starting to wonder...