Monthly average revenue for Star Wars: The Old Republic, BioWare's massively multiplayer online role-playing game, has more than doubled and subscriptions have increased since adopting the free-to-play model last year, Electronic Arts president of labels Frank Gibeau revealed in an earning's call today.

EA announced that the MMO would adopt a free-to-play model last July, and the transition took place in November 2012. Since then, Gibeau said the game has grown significantly.

"Since it was induced in November, we've added more than 1.7 million new players on the free model to the service," Gibeau said. "And the number of subscriptions has stabilized at just under half a million.

"The really interesting thing that's happening inside the service right now is monthly average revenue for the game has more than doubled since we introduced the free-to-play option. And as we look forward, we're going to continually invest in new content for the service and for players every six weeks or so."