CrowdVine.com/Conferences - CrowdVine for Conferences

CrowdVine for Conferences let's conference organizers add a social network to their conference in order to help attendees meet and network. Features include an easy to use social network, session calendaring, and twitter integration. They provide an easy-to-use networking Website, customized for your event, that helps attendees quickly share information about themselves and find others. CrowdVine helps attendees find and connect with each other, before, during and after your event. This helps attendees to arrive at your conference excited to meet new friends and prepared to build new relationships. Through data feedback, you can discover topics and people important to your attendees. It's free, it's hosted, and the founder is working extremely hard to build software that makes your day.

“The site was conceived and mostly built by Tony Stubblebine (me). I had a lot of help, especially from the excellent design firm Neatworks Inc. The site's in beta but I'd like to drop that label as soon as possible. I'm working hard to make the site better and that's not going to change when the designation changes.”

Half the reason to go to a conference is to meet other people but the only thing most conferences offer is a printed attendee list. This software will definitely change the functioning of a conference.

What is their business model if they are providing this software for free?