Hello Mike, thank you for your suggestion. You can not boost other people photos, but you can un-pause them, and I have already forwarded suggestion before when it was discussed about it to remove un-pausing.
"Scott Crow has spent 5 credits to give your image a minimum of three additional ImageDuels. Based on its ImageDuel history it had previously been paused (i.e. was no longer being matched in ImageDuels). You can view the image here: http://www.pixoto.com/images/51109186..."
So this was just un paused? what is the difference?