Looks like you were able to upgrade your account to a free 90-day trial of Pandora Premium directly through our website. Sorry for any confusion about payment information being required to initiate your trial.
To clarify, we require payment information to begin a trial of Pandora Plus, Pandora Premium or Pandora Premium Family because we believe that our listeners may be interested in becoming paid subscribers. This helps provide a smooth transition for those who enjoy the trial and want to continue the service. Requiring payment information to initiate a trial is a practice common among many online subscription services.
However, you will receive an email notification confirming the length and terms of your trial when you sign up, and you won't be charged until the free trial ends. In addition, you're welcome to cancel your trial at any time.
If you discontinue the auto-renewal of your trial subscription, you will not be billed when the trial concludes, and your account will return to the free ad-supported version of Pandora.