BranchOut/Glassdoor Facebook Friend-network Invite Integration
How do companies like BranchOut/Glassdoor implement protocols for mass referrals of friends through networks? Aren't all Facebook applications limited to the Requests Dialog for user referrals? As far as I know, we aren't able to use FQL/PHP to refer users through the Open Graph API either (BranchOut/Glassdoor still send out user-pushed application notifications nonetheless). Just how do they do it?

http://i.stack.imgur.com/5q9Kj.png
BranchOut/Glassdoor Facebook Friend-network Invite Integration
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How do companies like BranchOut/Glassdoor implement protocols for mass referrals of friends through networks? Aren't all Facebook applications limited to the Requests Dialog for user referrals? As far as I know, we aren't able to use FQL/PHP to refer users through the Open Graph API either (BranchOut/Glassdoor still send out user-pushed application notifications nonetheless). Just how do they do it?

http://i.stack.imgur.com/5q9Kj.png