The Streisand effect has a bit of confirmation bias at play.

For every case of "idiot billionaire tries to suppress story and fails" I suspect there are quite a few "billionaire successfully suppresses story" cases.

Because he simply doesn't have to. He is controlling comically evil ad machine which is always caught redhanded doing something deeply immoral and nothing ever happens for them apart fine from EU from time to time. He is not even trying to have some positive image. He doesn't have to.