Nothing to do with 2:1 sales advantage, pure Sony moneyhat. 

http://www.vg247.com/2015/08/06/its-been-confirmed-competitive-call-of-duty-is-ditching-xbox-one-for-ps4/

Money hats are good, they are all about passion and support.

M$ infinite money cannot help, but it's not because market share :p

Sony throwing away their warchest after warchest? I thought they were bankrupt or near that?

Only Sony can moneyhat, everyone else is evil for doing it.

Isn't this classed as Sponsoring?

This will have an even bigger effects on COD sales, it will show COD is only home of the constructor who paid for it

At least it's not paying to prevent a whole game to go an other platform

Sony payed just as much for the cod deal as ms would have but ms wasn't interested in it. So that's how Sony got it....

That's the narrative spencer wants us to believe.  

But Sony haz no money! The internet said they were going bankrupt!

Sony has a bigger marketshare. Almost double Xbox One. They would pay less than MS paid for the marketing deal.