Control of assets like photos and stories is implemented through the publish options. You can publish stories and pages only for yourself or only for friends (or members in the case of pages). Photos remain invisible to other users till you publish them in a story using the “public” option. You can add a photo uploaded by another user to your favorites. Such a photo can be used in your own story but you will not be able to modify it. Moreover, two Pixpoints will be deducted per photo. One point will go to the original uploader and one to Pixstory.