I just joined Snapwire to submit images to the library (not the Requests).
https://www.snapwi.re/marketplaceTheir marketplace has some great images but when I asked about Exclusivity this is what they said:
"We only require exclusivity for Premium photos which are manually chosen and tagged by our curators."
I then asked what if my image gets selected as premium and it is NOT exclusive ...
"You will be notified when a photo of yours become Premium. If you don't want the exclusivity, you may simply delete the photo from your portfolio and reupload.
"
Does this seem a bit odd? I have to delete images if they get selected as premium and then upload them again. What if they get chosen again as premium? Seems like there should be an option to check if it is exclusive.