I guess his tweets are basically just sparks which burn down rabid crypto speculators' ounces of decency. Sometimes their decision could be because the price was going up, and the original cause of the price rising was because of McAfee's tweet. They could even see that the price was rising,
then look back at McAfee's tweet and decide that the price rise was justified
because of the tweet.
he says he conducts due diligence on what he does shill. And since he does have this bizarro rep to maintain now it's in his interest not to push absolute shit.
I'd say that he can post absolute shit and still maintain that reputation as long as the shit he promotes rises in price. And since ironically it rises in price just from him talking about it, he's pretty much invincible unless he gradually loses influence or he starts promoting overt scams.