The decline of both ESO and Wildstar was a disaster on ALL tracking tools already during the past months. Up to 80%+.
Of course you can negate XFire.
But when the SAME trend can be seen on Raptr, NO presence in VgCharts, NO presence on Amazon top 20 PC sales, NO interest on Twitch, both by streamers and followers, it is pretty much clear WHY these games don't publish ANY player numbers.
The 750k ESO are pretty much the total launching figure spread over 2 months and taken as a global estimate point.
WoW may have 6.8 million FIXED subscriptions, but all the rest stands at ZERO subscriptions with free to play numbers to massage the ailing MMO industry.
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If there is anything to say is that this MMO industry went free to play over the last 3 years. All subscription based MMO's in the west and most in the east went free to play after 1-2 years.
No doubt it shows a HUGE decline overall and the thing is: these "things" cost so MUCH more than the huge hits of today.
Supercell games or Zynga games on the iPad or Hearthstone or LoL are sooooo much easier to make with ONE map game play, ... you won't see much move any more as MMO's are concerned.
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Blizzard needs 160 + programmers (and many more helpers) to make ONE expansion for WoW for 4 years ...
While most iPad hits were made by 15 people over 1 year.
Guess three times where this will end ?
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Also : it is rather PATHETIC that people still use these old mmodata made up and fabricated by an idiot living in Antwerp. The site was no longer updated since ... mid 2013.
The reason is simple: subscriptions are replaced with meaningless free to play figures.
Every WoW hater stumbles over WoW subscriptions while the others were reduced to zero official subscriptions after 1-2 years due to free to play.
It is like comparing the New York best sellers books with some free printed pamflets distributed on a train station.
TLDR.
There is hardly an in game factor. There is the MMO industry going down the free to play road abandoning subscriptions and ... it is not a pretty sight.
As these MMO games cost a fortune to make and not ONE except WoW makes a fraction of the money that iPad Supercell, or LoL or even Hearthstone make, all single map games...
And then people wonder why Titan was scrapped.