GamesMMOWorld of WarcraftWorld of Warcraft devs used to joke about the MMO making $1 million per month - just months before it smashed through $15 million in monthly revenueWhen you purchase through links on our site, we may earn an affiliate commission.Here’s how it works. GamesMMOWorld of WarcraftWorld of Warcraft devs used to joke about the MMO making $1 million per month - just months before it smashed through $15 million in monthly revenueWhen you purchase through links on our site, we may earn an affiliate commission.Here’s how it works. When you purchase through links on our site, we may earn an affiliate commission.Here’s how it works. (Image credit: Blizzard) When it comes to MMOs,World of Warcrafthas been the big name in the market for the best part of two decades. But before it became the gaming juggernaut it is today, expectations for the game were, in relative terms, pretty modest to say the least. In an interview inRetro Gamerissue 266, formerBlizzardand WoW developer Bo …