After I fulfilled my first contract, I cancelled and started a new one for more free DVD's (call it what you want). But then I kept that one even after the contract ended and got amazing deals on other DVD's which made it really easy to build my collection.
Now that I'm about to be a mama, I looked over my collection and realized that I have no kid DVD's at all and I really want my little one to enjoy the same movies that I grew up with. I got an email about Disney movie rewards and signed up right away! It's a lot like Columbia, only you get to choose 4 DVD's for 1.99 and then you have two years to purchase 2 more DVD's at full price. The other great thing is that they have a great reward system where you can earn points and use them on other fun prizes and Disney collectibles.
If you would like more information on how to join, please leave me your email address in a comment and I'll send it to you. If you have kids, this seriously is a great program to belong to!