Non-subscribers can get access to locked images by watching video-ads! When you receive a pop-up message offering a free image, just click to watch and finish the video-ad to unlock a Premium image!
Once the image is unlocked, it is placed inside the original album it belongs. So if you unlocked an image from the Floral album, it will be placed inside the same album!

If you are not receiving a pop-up asking you to watch an ad in order to get a free image, this means that the ads provider does not have any new videos to play on your device. But you should be able to get new videos soon!
Only non-subscribers receive the Free Daily Pictures. If you are using a Free Trial or if you purchased a subscription, you will not receive them because you should have access to all the content available.