Webjoy has done recent work in updating a client website which provides a sign-up / registration facility for all schools and youth clubs in the UK. Schools subscribe and then they can download video sessions which provide resources for PSHE sessions.
It supports membership sign-up and offers 2 or 3 year discounts. The primary service is to provide one years access to the video download service. It links to PayPal in order to purchase a time-limited subscription. Other work has been in providing changes and support of the aweber email system in order to offer and promote various time-limited subscriptions. You can visit the website here Operation Smoke Storm
The technology would be applicable and adaptable for any website which wants to provide electronic downloads via a subscription based mechanism. It also includes a budgeting system to avoid and restrict the resources downloaded. Associated with it is a reporting system so that you can monitor who is using what resource and when.