In order to make money flying a drone you first need to pass a test to become FAA certified. Beyond this, there is often a myriad of local and state laws to follow. Maryland however, has done drone pilots a favor. The FAA asked states and cities to not pass their own drone laws as it becomes a very murky web of laws with no central way to manage it. Maryland obliged, passing a law of their own preventing towns and cities from passing any drone related ordinance. Hopefully more states will follow suit!