Burek on 03 September 2014
It is obvious that 53 million mentioned is the number of SEN accounts, so that would include PS3/4/Vita users, Music and Video users, and SOE online PC games accounts....
PS+ users on PS3 were probably just above a million, which makes sense. It was a non-essential service giving away digital downloads. Sure, it was good value, but I doubt many casual owners took advantage of it.
