Any stats data advocating integrated social logins over traditional user / password login? [duplicate]

1. Do users prefer social login?
2. How many people use social logins?
3. Why not to use social login?
4. Is social login safe?

Do users prefer social login?

Given how many users indicate they prefer social login, giving people the option to register using their social account IDs rather than a registration form is more likely to increase user engagement.

How many people use social logins?

Gigya Survey: 88% Of U.S. Consumers Say They Have Used Social Logins.

Why not to use social login?

Social logins might contain false information

Social media websites don't always require their customers to sign up with their real names, meaning that when they do, any information associated with their social login could be false.

Is social login safe?

Those who decide to use social login authentication for their application should recognize that the application is essentially only as secure as the platform providing the service. Having stronger passwords is one thing, yet in a credential breach, passwords (both weak and strong) can be universally compromised.