Ohhh Blizzard, you so funny!!! I was going to buy another Annual Pass had you given MoP free with it, I didn't need an entire game to sign up for it. I won't give you $40 for an expansion to such an old game when it should be priced at $20, but I'll give you a year worth of subscription if that expansion is included for free.
It's like Blizzard hates money. I'd give them $180, they just had to give me a $40 expansion. Silly silly Blizzard!