http://www.ubergizmo.com/2011/11/dc-universe-online-gains-1-million-new-players-in-a-week/
It’s only been a week since DC Universe Online went free to play, but Sony Online Entertainment has reported that the DC comics-inspired MMORPG has already gained 1 million new players, with a 50/50 split between PC and PlayStation 3 gamers.
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http://en.wikipedia.org/wiki/Free_Realms
"John Smedley, president of Sony Online Entertainment, revealed that 1 million users had signed up to Free Realms 18 days after its launch;[22] a month after release Free Realms reached 2 million users,[23] and registrations have continued growing at a steady rate since then. As of July 24, 2009, it had approximately 5 million registered users.[24] Sony Online Entertainment announced in February 2010 that the game now has 8 million registered users.[25] In April 2010, it was announced that the game has now 10 million players, with two million players signing up in March 2010."
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http://www.reuters.com/article/2012/03/12/idUS166395+12-Mar-2012+PRN20120312
SAN DIEGO, March 12, 2012 /PRNewswire/ -- Sony Online Entertainment LLC (SOE) and LucasArts, a division of Lucasfilm Entertainment Company Ltd., today announced that Star Wars®: Clone Wars Adventures™, the free-to-play, family-friendly, online game based on the popular Cartoon Network animated series, Star Wars®: The Clone Wars™, has more than 10 million registered players.
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All by the same people who has "failed" MMO's, which has more players then SWTOR
Having the FTP model is more appealing them having to pay 15 bucks, theres people that will play the PVE side of the game for the story alone.