Audible.co.uk - Free Audio Book

I signed up by going to the site - I think there's a regular "the first one is free" going on with audible.

When you sign up you have to give your credit card details to sign up for a £7.99 a month subscription, but you can cancel within the first 30 days and keep the audio book. As they're linked to Amazon, I allowed them to pick up the details from my Amazon account.

I downloaded a book, then went to cancel membership. At that point it offered me the following:

Leaving so soon? Stay and get 50% off your next three months of membership. Maybe your trial period didn't give you enough time to learn about the great benefits of Audible monthly membership. Stay and get to know us better, and we'll give you 50% off your next three months of membership.

• Enjoy your next three months of membership for just £3.99 per month, and £7.99 per month thereafter
• One monthly credit to purchase an audiobook from our extensive range
• Member-only sales and promotions
• Access to our Members' Page, where you'll find free downloads, news on forthcoming releases and more

From rooting around on the site I found that you can cancel your membership at any stage:

http://audible-uk.custhelp.com/app/answers/detail/a_id/4055/

As an Audible customer you are able to remove your membership plan at any point prior to the next billing date (make sure any available credits are be used up before cancellation as these will be lost when the plan is removed).

By being a member you get 1 credit per month. 1 credit seems to buy you one book, and you can roll up to 6 credits. When you cancel you lose any outstanding credits (so spend them before you cancel), but you still have access to the books you've already purchased.