When you are running a Pic Challenge, you will want to see the posts that your users have posted and the engagement they have received on their pics.  To view your Pic Challenge submissions.  Go to Features/Pic Challenge and click "Review" on your Pic Challenge

Once in the Pic Challenge, expand the "Filters" and choose your filters.  Then, in order to see the pic stats, click "Export"

You will be able to see the following information in that export:  

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