[{'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. We may periodically send you free newsletters and e-mails that directly promote our Services. When you receive such promotional communications from us, you will have the opportunity to "opt-out" (either through your Account or by following the unsubscribe instructions provided in the e-mail you receive). We do need to send you certain communications regarding the Services and you will not be able to opt out of those communications - e.g., communications regarding updates to our Terms of Service or this Privacy Policy or information about billing.'}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]