Project Zero is different compared to performing end to end breaches. A breach team might use 0-days of Project Zero to actually compromise Google's internal a

Project Zero is different compared to performing end to end breaches. A breach team might use 0-days of Project Zero to actually compromise Google's internal assets to see if their defenders can detect an adversary. FB has such a team and they gave public presentations (one was at RuxCon 2016) how they compromise for instance their domain controllers and stuff.