Vinne,
to your original post.
I too am gold and have been exclusive since I qualified. I also do a pretty good monthly business at IS and have no interest in working with other sites since i only do this for fun and the nice money that comes with it. So many variables others have mentioned, so it is hard to tell if you would come out ahead. I just sold a signature plus medium size photo, and my take was just under $16. Sale number totals are down each year for the past 3-4 years, but $ earned is nicely on the rise again since they redid the collections. Is it helped by being exclusive??? I don't know but am happy with it.