Diablo III Collector's Edition Adds Four Months to WoW Annual Pass

So you're interested in getting Diablo III for free with the purchase of a World of Warcraft annual pass, but would rather own the collector's edition instead of the standard edition? Well, you'll no longer get D3 for free, but what you will get is the equivalent of $60 worth of WoW game time with four months for free:
What if I purchase the Diablo III Collector's Edition?

If you decide to purchase the Diablo III Collector's Edition when it's available, and then choose to add your Collector's Edition license key to the Battle.net account associated with your existing World of Warcraft Annual Pass promotion, you will receive all of the benefits associated with the Collector's Edition, plus receive four months of World of Warcraft game time which is eligible towards your 12-month subscription commitment. After you purchase the Diablo III Collector's Edition you just need to input the product key into the Battle.net account associated with your World of Warcraft 12-month commitment and that account will then receive the next 4 months of World of Warcraft game time for free. For example, if you already had a month of game time on the associated World of Warcraft account when you input your Diablo III Collector's Edition product key, it would then be 5 months until your next subscription payment was due.