I chatted with them on instant chat and they said that they were going to keep this offer open for a while.
When they had their free-day of watching as many of the classes as you could fit in, I ran into some teachers that were either not very good at teaching or had a teaching style that I didn't like. I don't mean to sound fussy, but sometimes I find that some teachers are just annoying. Fortunately, this only happened a couple of times and since it was free I just stopped watching and went on to another class. With this in mind, I think that this would be a great way of learning new things, practically at the drop of a hat.
The one drawback to this promotion is that you won't own the class, of course you can go back and view it as many times as you want, so that certainly makes up for that, but only for as long as you continue with the promotion.
I plan on joining as soon as I get my multitude of doctor's bill paid off. Then I will be in hog heaven checking out all the classes on other subjects that I wouldn't necessarily purchase.