Player 1, plays 8 hours straight then pass it on.
Player 2, is taking over and plays 8 hours then pass.
Player 3, is taking over and plays 8 hours then pass
That's 24 hrs of play between 3 players sharing the same account.
While one is playing the others are bouncing between work and sleep.
You can't prove this but it's happening in PvP and there is nothing you can do, it's legit because the other top dogs in the leaderboard wouldve been banned by now..
Overall 2K invades (win/lose) is NOT feasible in a week if your legit.
It's even easier to achieve if you've got more then 3 players rotating..