Jomsocial's native Facebook connect function does not work with Joomdle (integrator for Joomla and Moodle) The plugin "user joomdlehooks" which provides for common account management between Moodle and Joomla must be disabled for FC to work.
Does your product have this same conflict issue?
Hehe. You're right, we screwed up. Sorry for the delayed response. Our support forums are monitored heavily, and we just missed this post. Feel free to check out our support forum response time or our reviews on the JED, they should counteract a little bit of the service you've seen so far.
As to your question, I honestly don't know the answer, as we've never tried that add-on. We do have a 30-day money back guarantee, and if you can't get it going, or just aren't happy, you just have to request a refund. There's been only a few 3rd party extensions that users have run into that we haven't been able to come up with a work-around for. In general, we create a standard Joomla user (you don't even have to integrate with JomSocial if you don't want to), which allows for 3rd party extensions to usually not even 'know' that the user is from Facebook.