Contests and Galleries created on and after 26 May, 2016 will have new registration flow. In this when a new campaign is created "Connect with Facebook" option is not selected by default instead Email address is selected so that users without Facebook account can also participate in the campaigns. "Facebook Login" option is also provided, so that you can choose either of these or both.
When user clicks on Enter now, registration form is loaded where in user can enter Email Address or choose to Connect with Facebook and continue with the submission. This would make the entry process easier for the users. With this new feature users would be required to enter the registration data every time they enter to submit an entry. When Connect with Facebook option is selected Email Address, First Name and Last Name are auto-filled with the information available on your Facebook profile.