I just want to add my weight behind Juggler's question. I have no idea what it means by including source. Is it enough to put a link to the actual unity project (not the exe) on my dropbox so that others can access it?
At this point I recommend just uploading whatever is needed to open your game in Unity when you submit to the jam. During my source verification check I will let you know if you need to remove any paid assets from your project.
