mrstickball on 16 February 2010
I think the comparison in terms of registrants of XBL-PSN isn't even applicable. Sony requires signup for more services than MS does, AFAIK, so its not an apples-to-apples comparison.
Concurrent users would be a good metric. However, as the article says, Sony hasn't revealed that. And guess why? They won't because they have fewer users.
Back from the dead, I'm afraid.
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