[{'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: Offer wall Our games may display a third party hosted "offer wall". Such offer wall allows third party advertisers to provide virtual money to users and in return such user will respond to an advertisement or complete an advertisement offer. Such offer wall may appear in the games and be displayed to you based on certain information, such as your geographic area or demographic information. When you click on one of these offer walls, you will leave our or our partners\' site at the time. A unique identifier, such as your user ID number, will be shared with the offer wall provider in order to prevent fraud and properly credit user accounts.'}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]