Hmm okay good question - 1. We wanted to keep it simple (1 login vs 2) 2. We thought that in general people care more about their facebook friends than their l

Hmm okay good question - 1. We wanted to keep it simple (1 login vs 2) 2. We thought that in general people care more about their facebook friends than their linkedin friends (contacts?) so we chose fb instead of linkedin. 3. LinkedIn also locked down their api so you can't get contacts unless they are also on the app.