I'm using a CC that earns rewards. I purchase pretty much anything I would with my debit card on it to earn rewards then pay it down with cash. Many purchases are unexpected and on the fly when outside. Since the card is about the exact limit of my BTO MBA purchase, I wanted to make sure it doesn't decline while I'm using it for other reward purposes or lag time after payments are made over the next couple weeks. Knowing at what point Apple charges the BTO MBA or puts a hold on the card would be helpful for that reason as I don't want my MBA to be cancelled or have delays.