TheStreet: Ask a teenager if they’ve heard of Jack Gilinsky and Jack Johnson, and chances are they have. For everyone else though, Jack & Jack may not exactly be household names — yet. While teens and young people may be most familiar Jack & Jack’s comedy skits and music, they may provide a deeper read on possible trends within the social media space. Johnson said the social media platforms they use to connect with fans most include Twitter, Vine and Instagram. So what about Facebook? He explained that Facebook isn’t really what their followers use these days, as teens have migrated toward other platforms.