13. The system of claim 9 , wherein providing the image and the text query to the plurality of second users further comprises: including the image and the text query pair in a list of additional image and query pairs, the image and text query pair having a position in the list; and selecting the image and text query pair from the list for presentation to the plurality of second users, the selection based on the position of the image and text query pair in the list.
13. The system of claim 9 , wherein providing the image and the text query to the plurality of second users further comprises: including the image and the text query pair in a list of additional image and query pairs, the image and text query pair having a position in the list; and selecting the image and text query pair from the list for presentation to the plurality of second users, the selection based on the position of the image and text query pair in the list. 15. The system of claim 13 , wherein the operations further comprise: determining an impression score for the image and text query pair based on an indication of interest received from each second user; and modifying a position of the image and text pair in the list provided to a plurality of third users based on the impression score.