Getting around mercantilism
During the early 1700's, Britain practice Salutary Neglect which basically means that the English avoided strict enforcement of the Navigation Acts or any other law that was aimed towards the American Colonists. Most of the Colonists didn't took fond of the Navigation Acts as it hurts their business with the other European powers. Due to Salutary Neglect, colonists found it easy to smuggle (Illegally exporting certain trading items) in some specific goods from other countries. For example, due to the Molasses Act of 1733, American merchants smuggled French Molasses by bribing customs officials.
Smuggling to get around the Navigation Acts could be similar to the smuggling of alcohol during Prohibition which banned the sale, production and transportation of alcohol.