World of Warcraft classic has been a huge success for Activision Blizzard, the company revealed today that the retro release subscription figures have prompted the largest quarterly increase in history. Classical came out on August 26, World of Warcraft players pay for the same subscription to have access to a regular game and the classic, which runs the server based on how WoW before launching any expansion. Many players, it seems, want that old-school experience of WoW. We do not, however,…