Best hackers work for nobody, no one can afford them and they are not interested. Unless somebody touch their weak spot, you or me or ... average agent Joe will never get close to ;)

More over they do not advertise on msm channels what they did and did not.

Usually their activities are found when they dump data silently, or never.

Applies to best thieves, best assasins and so on. If you are best in class, you can't be bought, it's you who buys others.