Call of Duty is giving away Early Access Beta keys.
You normally would have to pre-order the game to get into the Early Access Beta, but you can now just go to https://gleam.io/k3eDI/anz-modern-warfare-4-open-beta-early-… to claim a key to play the Early Access Beta without pre-ordering the game at all.
The Early Access starts Saturday 22 Aug and ends Tuesday 25 Aug AEST.
Pretty good. You don't need a FB or Instagram account.
Use the Instagram option - click the "visit IG page", then go back to the Gleam page and it should give an option to enter your name/email address etc, then you get emailed instructions afterward.