 Guest Rewards members accumulate points by riding Amtrak and through other activities, and can redeem these points for free or discounted Amtrak tickets and other rewards.Through various commuter services, Amtrak serves an additional 61.1 million passengers per year in conjunction with state and regional authorities in California (through Amtrak California and Metrolink), Connecticut (through Shore Line East), and Maryland (through MARC), .Sometimes, Amtrak will share trackage rights with independent commuter services.