Looks like Activision is trying to drum up some more business, as they are running a free trial of their Battle Royal version of Call of Duty starting later this week. From 1/17/19 - 1/24/19 at 1 PM EST, you can play Call of Duty: Black Ops 4 Blackout for free on PlayStation 4, Xbox One and PC.
Check out the trailer announcing the free trial to see a bit of the action you can expect.