A:AnswerAfter 16 hrs, my order status is still "Waiting to be fulfilled". A phone call with multiple BestBuy representatives taught me that the fulfillment of a BestBuy digital download order may take 24-48 hrs. This information should be disclosed on the product page!
A:AnswerYou can use multiple - you don't apply gift cards to purchases, you load gift cards to your account, and their value is stored to use on reservations. Which is kinda dumb because then it's tied to your account, and there's no way to find the gift card value without adding it to your account.
Expiration: Not sure about these, but previous Airbnb gift cards I've gotten have had no expiration date.