The other half of the story that Blizzard and Activision haven't exactly addressed is they have 3 popular games using its Battle.net service. You have Starcraft2 that yields at least 100,000 users a night, perhaps more when it is being played during the prime time of the week. Next, you have to consider World of Warcraft services millions upon millions of users. The last time I checked, World of Warcraft had a population of 9 million gamers. Therefore, you have that many people using the Battle.net service. Finally, you have Diablo3... case in point, there are millions of users on the Battle.net servers. At World of Warcraft's prime, its population of gamers ballooned to 12 million. Blizzard's games are some of the most popular games to be played. Instead of looking at population by game, Blizzard needs to look at the number of Battle.net accounts because this is the potential how much the service is going to be used. My suggestion is to make the Battle.net servers to be strong enough to service at least 15 million users.
Only a week ago, the @NBA on Twitter reached 5 million followers. Battle.net services at least 10 million users a day. Across a week, Blizzard/Activision need to address its population and how much it is capable of booming. World of Warcraft may be ancient history to some people, but it is still being played.