[{'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: Billing and Financial: Developer does track purchases made using Xsolla, Facebook Credits, Super Rewards, Trial Pay, and/or other 3rd party wallet services, but Developer does not have access to any personal billing information; purchases are tracked for purposes of making sure that Developer deliver great value for money and so that we can provide awesome customer support should something go wrong."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]