What is the difference between this service and the free busses at the airport that only take you to a certain hotel or car rental offices or say cheap chartere

What is the difference between this service and the free busses at the airport that only take you to a certain hotel or car rental offices or say cheap chartered air flights sponsored by a casino and of course packaged with the casino stay? I consider myself 100% pro-NN but I'm having a hard time resolving these analogies.