Memberships are very powerful and are a good tool to keep your customer coming back. There are 2 kinds of memberships, Regular and Subscription.
A regular membership simply gets the price from the price matrix if the membership is NOT expired.
A Subscription membership rents qualified movies for free. The movies are due one day after the membership expires. If they purchase another subscription membership, all movies currently under the membership that are checked out will be changed to the new due date (one day after the new membership expires).