There are no fees associated with the ongoing use of Artkive and storage of all your images until you have at least 40 images in your account. Once you have more than 40 images, you will be prompted to select a membership based on the benefits that make the most sense for you.
You do not need a membership if you only use the Artkive Box Service. You'll receive 3 months of free membership each time you complete a box order.