Robin explains the sharing economy to the rest of the Teen Titans, as they are unfamiliar with it. He makes sure to show how much money he made through his participation, which entices the other Titans to join. Robin then demonstrates how to participate in the sharing economy: using a smartphone application. Cyborg uses the app to rent out his left arm to Beast Boy.
In his opening comedy sketch, Jerry laments that his "Night Guy" always wants to stay up late, but then "Morning Guy" must bear the cost of not getting enough sleep. This is a great example of the dual-self problem discussed in behavioral economics.