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