Update October 5, 2016: Whoops. Blizzard have clarified to multiple outlets that Tom Chilton's statement to Polish magazine PIXEL about WoW subscriber counts was a misquote or mistranslation.
Perhaps unsurprisingly, after saying they would not be giving out Subscriber numbers again in a conference call in 2015, Blizzard have denied that Lead Game Designer Tom Chilton revealed exactly that in an interview. They describe it as either a "misquote" or "misunderstanding on the part of the journalist."
I wonder how the rest of our list of the best MMORPGs stack up.
In a statement to GamesBeat, a company spokesperson said "After speaking with Tom on this end, we can confirm that this was a misquote or some kind of misunderstanding on the part of the journalist. Our policy for almost a year now is that we do not talk about Subscriber Numbers and Tom did not do that with this publication."