In a note to press, Activision said it had shifted to a "shared ecosystem business model" for Call of Duty, which has seen the launch of battle royale Warzone, mobile hit Call of Duty: Mobile, and Call of Duty: Black Ops Cold war this year.
The mention of a "shared ecosystem" relates to the emergence of Warzone and the integration of Modern Warfare and Black Ops Cold War into it. From mid-December, Black Ops Cold War and Warzone share battle pass progression, and you'll be able to level up and get XP no matter which game you play.
The $3bn figure is the net amount of products and services sold digitally or sold-in physically during the last 12 months, and includes license fees, merchandise and publisher incentives, Activision said.
They haven't made any money from me. I do play Warzone a fair bit with friends but I've never bought any MT's or packs or whatever they are
(It would take over 90 years for you to count to 3 billion)