Lizzie Magie married Albert Phillips, a fellow activist and supporter of Georgist principles. Albert was a strong supporter of her work and the ideas behind the Landlord's Game.

Recognizing the increasing popularity of similar games, Magie obtained a second patent (U.S. Patent No. 2,026,082) for a revised version of 'The Landlord's Game,' hoping to regain control over its development and commercialization.

In an attempt to gain recognition and compensation for her work, Magie sold her patent for 'The Landlord's Game' to Parker Brothers for a reported $500. Parker Brothers subsequently developed and marketed 'Monopoly,' which became a global phenomenon.

Parker Brothers interviewed and featured Lizzie Magie in promotional materials to highlight the history of 'Monopoly,' but downplayed her role and the game's original purpose as a critique of economic inequality.

Lizzie Magie Phillips died at the age of 82 in Arlington, Virginia. She never received the widespread recognition or financial reward that 'Monopoly' generated, but her legacy as an inventor and social critic has endured.