Hi there! While I'm happy to hear that there's excitement to participate in this jam, we've had a rule that team sizes should not exceed more than three people! Hopefully your extra person can help with someone else potentially looking for a teammate? Or maybe they can form their own team? We're open to revisiting the rules for the next Classic, but we'd like to keep things as they are for the time being. 
We have no prizes this year as we couldn't come to an agreement on what to have. However, if there's 3 competing team members and one non-competing, that should be fine. Perhaps you could be like a coach for the three, and then enter yourself as a separate jammer? That way you still get to participate.