exploitative play profitable in highstakes ?

I'm just curios that can we play exploitative style in highstake online cash game
If not so what stakes that exploitative play won't work and need to start learning GTO

Does pro poker (llinusllove,Trueteller,OtB_RedBaron) play GTO ?

of course it is more profitable if you can win the main prize

:frown::frown::frown: