As with all forms of advertising, they evolve and change. What was once very effective and popular just doesn't seem to work as well as new and more effective methods come along. With the world of the internet this happens at a very quick pace. It's not at all uncommon for 'the king of the hill' to be outdated and ineffective in just a few short years. Video email marketing is just beginning to really take off right now. It's on a huge upswing and gaining in popularity all the time.
