> "The email people used to sign up for Facebook was not one that they checked every day (which is especially important if that’s how you want to schedule event

> "The email people used to sign up for Facebook was not one that they checked every day (which is especially important if that’s how you want to schedule events)." That doesn't strike me as an issue that's unique to using Facebook Login. There are plenty of people that don't check their email on a daily basis.