[{'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: To allow your use of certain features of the Service that may be offered from time to time (such as Premium Services (see our Terms of Use), games, greeting cards, animations, etc.) and to help customize your user experience;"}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]