Users can go to Paypal and add the email address that is registered to their Facebook social login.
Facebook account is registered using firstname.lastname@example.org
Paypal account is registered using email@example.com
EarnHoney will automatically send Paypal redemptions to firstname.lastname@example.org. This is a security measure, so people do not hijack your redemption.
By adding email@example.com to your Paypal account, you will receive redemptions from both firstname.lastname@example.org and email@example.com