I'm not arguing with free, but just make sure you note the fine print:
<< When the subscription ends we will automatically continue your subscription for as long as you wish, without interruption at guaranteed savings off the cover price, unless you instruct us otherwise. We will notify and bill you prior to each new subscription term. You may cancel your subscription at any time upon request and you will receive a full refund for all unmailed issues. >>
Not everyone is comfortable with the automatic renewal (and billing) scenario.