Nestle have given press releases describing their 'collaboration', and even set up this website. Its inconceivable that Google did not demand payment; Google could have called it something generic like all their previous versions.
Google of course probably approached Nestle. They created a new revenue generating angle on creating an OS.
Debian ought to go get money from other brands through similar version naming.
Seriously, why isn't the next Ubuntu called "Head&Shoulders"?
Right. Why does Google need to paid for this? Any dollar figure would be insignificant, not scaleable and not part of their core business. Selling naming rights to their SDKs?! Are these baseball stadiums?
Calling the version "KitKat" was basically product-placement.