This is quite literally the first story arc. There isn't a need for anything substantial. It's an introductory phase. The six post limit was put there to expedite the process and get to the meat of the story where there will be plenty of time for substantial interactions and complex actions. The collaborating is what has forced KoL to use an actual time limit rather than just a post limit because the whole thing is getting held up by people trying to bypass the original constraints.