Is it possible to sign up to Influence without Facebook?
It is possible to sign in without Facebook. An email-only sign up has been introduced to allow people without Facebook account's to join the app.
The reason the Facebook login is in place is to make it quick and easy to create your Influence profile by pulling in your demographic details (your name, age, hometown, and gender) saving you time and allowing you to get started answering questions right away.
The email-only sign-up will require you to fill in profile details. This means that questions can be targeted specifically to you.