It's advertised on his website here: https://mcafeecryptoteam.com/effect.html

"Individual tweets, whether created in Mr. McAfee’s voice or by the company whose products we are promoting, cost $105,000 per tweet."

He orchestrated massive pump and dumps with his "Coin of the Day" bullshit a few months. He's a scam artist as well as a criminal, and it's about time the crypto world ignored him.