Plutocracy Passengers Multiplayer - Explained

About Plutocracy: Passengers, from BoardGameGeek:

Space is Time is Money is Power again. Plutocracy: Passengers expands Plutocracy by introducing a captivating solo mode as well as the addition of passenger transport to multiplayer gameplay. In the multiplayer expansion, new actions allow players to pick up passengers and fly them to their destination. When dropping them off, players can choose among a display of favors. These offer new surprising opportunities leading to even fiercer competition and introducing some randomness in a former deterministic universe. In the new solo mode you are trying to maintain the passenger transport by carefully selecting the passengers you transport and the routes you are taking before time is running out. Ten planet constellations are waiting for you and only you can tell if Mission Impossible turns out to be really impossible. -description from the publisher