Why not e-mail?
Email doesn't show any information on leads, you are sending your material out to someone and not knowing if they have read it or who they have shared it with. Social login provides a secure environment so you know that the material is for the eyes of only the person who has requested access.

Do leads really use social login?
Yes.  Almost everyone nowadays have some kind of a social media account.  We offer leads to login with Facebook, LinkedIn, or AngelList.

Data
Data on the leads are collected through social media for your view only.  No one else will have access except for the Admins on the account.