Purchase and use codes at your own risk at this point. While it may say physical, it is a code to enter on the Blizzard website. There have been mixed results from forum posters with some saying the codes worked and activated Forsaken on their account and others saying it didn't. Bungie cannot assist with this issue because the codes are entirely on Blizzard's system. Also take note that the reason the Blizzard store removed the products from sale on their store is so that Bungie can prepare for the Migration of licenses from Blizzard to Steam. If you choose to use a code and gain a license in this middle time between Blizzard and Steam, that license may or may not be transferred depending on when Bungie decides to actually record what accounts have what licenses. I would personally recommend just playing what you have now and waiting until October 1st and buying it on Steam properly instead of taking a big chance that you may end up throwing your money away on a code that might not work, and if it does work, on a license that might not transfer. Also keep in mind that the Forsaken package will be around 25 USD or your equivalent once it's released on Steam in October.