Referral Credits Reversed

[angier2]

I've just noticed that a few of my referral sign-up credits have been reversed, more than a week after they signed up.  Why would this happen?  Anyone know?

[ladavia89]

Were these people that shared the same internet connection? Or never fully completed the sign up process?

[Kohler]

Your referral bonuses were denied because the referrals were not unique and valid users as defined in the Terms of Service.  This means that they either entered false information, live out of the United States, or are otherwise ineligible accounts.

[tfw6693]

  I have found on mine that they had signed up before and used a different email. Such is life. You can find referrals pretty easily but finding ones that will take it and go is a lot more difficult. Keep trying.