In the case of WoW, those temporary re-subscriptions for 2-6 months upon release of new expansions is the business model that sustains the game. If Blizzard did

In the case of WoW, those temporary re-subscriptions for 2-6 months upon release of new expansions is the business model that sustains the game. If Blizzard didn't allow pausing and resuming billing at any time, the game would have died off many years ago.