I don't think they're (if they're, because it looks like a fake) aiming for the data.

If I were them and wanted the data I'd hack a big Facebook application' account and since most of them are very intrusive with their permissions I'd get a lot of data that way.

I bet from the backend it'd be very hard to do it, and the data might be encrypted using a key that only a Facebook user has (the user might have multiple keys and share them with friends... etc etc), anyways, I'm thinking too much about this, it's too late already :).