[{'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: Opt-Out Policy. Scan allows you to opt out of our use of your Personal Information for purposes other than the purpose for which it was provided. This includes, by way of example, marketing and promotional mailings relating to Scan products and services. In some cases, we may ask you to affirmatively indicate your consent to receive marketing and promotional materials. In the case where you decline the consent to receive marketing and promotional materials, we will not send you any additional materials other than those required by our service agreement with you."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]