First off, thank you!
To your question, nope! Your membership renews monthly (not annually), so your contributions will continue each month until you cancel your membership here, or email firstname.lastname@example.org to have us cancel it for you. Although there is no need to renew your membership each year, if you find you're listening to more shows, or that Maximum Fun has become a bigger part of your life, you can reflect that (and get a thank-you gift) by increasing your contribution to the next membership level. If you're happy with your current membership level but wish to update your listening habits, you can do that via the membership management page. Thank you again for your support!