[{'role': 'user', 'content': "Analyze the following clause from a privacy policy and determine if it's fair or unfair. Also identify any privacy practices mentioned: vii. Payment Information [OPTIONAL] If you choose to purchase an Additional Service or use a fee-based Additional Service and pay for such Additional Service by a means other than in-app purchases via iTunes or Google Play, we may engage a third party service provider to collect and process your credit card information. We will use your credit card information only to process your purchase or use our fee-based service. Please note that we will not retain your credit card information beyond the period necessary to facilitate the relevant payment. Your credit card settlement will be handled by appropriate third party payment agencies."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]