There are two locations to manage your Audiogon Insider Subscription:
To avoid your next charge, you may cancel at any time before your next billing date. Your billing date is dependent on your payment option—monthly or annual.
You may cancel your subscription by simply unsubscribing. There are no refunds or proration for canceled Insider™ subscriptions; though, you will retain your membership through your next billing date.
i.e. If your next billing date is 20 days in the future, you may cancel and still enjoy the benefits of your subscription up to that date.