Klout will never analyze your private data unless we are given explicit access. We will not share your private information with any third-party or brand. We do not publish any of your personal information such as your birthday and mailing address.  

Users are asked to fill out their birthday to confirm they are over 18 to be able to qualify for Perks.  Users are asked to fill out their mailing address so your Perks can be sent to you.  Birthdays and mailing addresses are not displayed on your profile.