Grand Theft Auto V has been a golden egg laying goose for Rockstar. GTA Online, the free online portion of the experience, has been a solid part of the package’s success. The online portion of the game has made Rockstar “at least” $500 million in revenue through microtransactions.

The report comes from Gamespot as they dig into the lawsuit between former Rockstar North President Leslie Benzie and Take-Two. They cite a line in the suit.

“GTA Online has the potential to achieve the greatest profit margin of any game created in the GTA franchise,” reads a line from the lawsuit. This is in part because GTA Online’s microtransactions have “nearly 100 percent profit margin,” except for development costs and fees collected by storefronts.

That’s a good chunk of change. Overall, Grand Theft Auto V has been estimated to have earned around $3 billion in revenue, according to the lawsuit.

GTA Online makes its money through selling in-game cash. Have you spent anything in Grand Theft Auto V‘s online mode?