OK I am looking to submit my photo application for Istockphoto.
Most of my work are illustrations, but not vector. In the illustration category it says you must provide a .eps file. I don't have that.
The other category is "Image", which seems more like what these are, but the entire application is about photography and has nothing about illustrations.

I dunno which one to submit to. 

EDIT: I suppose I could have asked this on Istock forums but well. I already had this open.

I'm going to just apply them as Images. I read on the forum if you don't have an EPS file in an illustration submission it's automatically rejected.