Why do free trials require credit cards
“Free” trials require credit cards because they want the trial to lead to the subscription, which will be automatic unless you take action to discontinue. Many people don’t pay close enough attention to cancel it early enough, so the company gets some money from you.  You are asked to provide credit card information to help ensure that you do not experience any interruptions with your service once your trial ends. Your credit card will not be billed until the end of the trial period. You can cancel at any time during the trial period by clicking 'Turn off recurring billing' in My Account.