Using the 'Require Email Address & Facebook Account Login' Entry Method
In case you are interested in collecting more than only Email Addresses and making Facebook a requirement as well as Email you can set your Entry Method to “Require Email Address and Facebook Account Login”.
Let me show how to select this Entry Method.
1.Within your “Advanced Options” in your Contest please navigate to your Entry Settings.
2. Next, navigate to where it says “Require Email Address and Facebook Account Login”
3. Navigate to the lower left corner if you are done with your Advanced Settings and hit Next