Why is there an “Email Me When Ready” button instead of an “Add to Cart” button on my course materials page?

Why is there an “Email Me When Ready” button instead of an “Add to Cart” button on my course materials page?

An “Email Me When Ready” button means that your course materials are not quite ready for sale. We are actively working on getting these materials ready for your course. If you click the “Email Me When Ready” button, we’ll email you as soon as your course materials are available for purchase.