Not sure if that offer is still available, but if you preorder the game from Amazon (and cancel the order later) you'll get a code for 4 gold battlepacks. I did that this summer (June-July) and it worked, I even had the preorderr badge on the battlelog even if I didn't preorder the game lol. Oh, you must use Amazon US for this and preorder the digital version, google how to put US data so it can recognize you as an US guy. YOU WON'T BE CHARGED, AMAZON TAKES THE MONEYS WHEN GAMES ARE RELEASED EDIT: Uhm just read again on Amazon (http://www.amazon.com/Battlefield-4-PC/dp/B00BXE4KYE) but it doesn't say 4 battlepacks, maybe only one but it's better than nothing :P
It doesn't look like it. Also, hopefully this is a typo - but according to that page, if you buy the downloadable PC version you won't be able to get it until New Years Eve at midnight...