Many popular Facebook apps obtain sensitive information about users—and users' friends—so don't be surprised if details about your religious, political and even sexual preferences start popping up in unexpected places.
Still, some app developers say they are seeking less personal data than they could. Rick Marini, chief executive of the professional-networking app "BranchOut," said that more than 20 million people have signed up for the app. What users may not realize is that professional information about all of their friends is also now a part of the app's database.
===> That lets "BranchOut" tout that it has more than 400 million profiles. <===