Up until today we have restricted photo purchases on Instimage.com to a quest’s owner only.
If you wanted to buy a photo on Instimage you had to create your own quest and wait for photographers to start posting to it in order to purchase.
This constraint has been lifted as of today. With open purchases, users can buy photos from any quest on Instimage now. I especially love this feature because it increases the value of Instimage to both buyers who do not necessarily have to create their own quests and to photographers, as they get to offer their photos for purchase to an audience that is potentially several orders of magnitude larger!