Update your preferences on the SHIFT website and sign in to the newsletter and digital marketing in order to receive the skins! You have to check both checkmarks!
you’ll get the Like, Follow, Obey player skins and 4NU-bis, Fuel Metal, Steel Raptor, and Tiger of Spartali head customizations.
Once it’s all confirmed, you’ll receive the reward via your in-game mail in the Borderlands 3 social menu.
https://shift.gearboxsoftware.com/account