[{'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 Walls FGFF games or their purchase pages may display an "offer wall" that is hosted by an offer wall provider. An offer wall permits third party advertisers to provide virtual currency to players in exchange for interacting with an advertisement or for completing a marketing offer that may include signing up for an account with one of those advertisers. These offers are not made by FGFF. These offers may be shown to you based on certain technical information, like your geographic area or de-identified demographic information. If you click on one of these offers, you will no longer be on a site hosted by FGFF or the social network through which you are playing FGFF\'s games. To properly credit player accounts and to prevent fraud, a unique identifier, in some cases your social network ID or FGFF player ID, will be shared with the offer wall provider.'}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]