Hi! First I'm sorry if I'm posting in the wrong forum and by my writing.

So now in blizzstore we have 50% of discount in wow games, and i only have now the battlechest.

But my question is if I buy the two expansions I will get free months? If I do, how that works.
I still can play wow until the 16 of this month, and if i register the games will accumulate or will replace the time i'm able to play?

My others question is what the difference about digital or physical game. In the physical game will come a book like in the battlechest?

Thank you!