What they have on them is money. Palantir, specifically Peter Thiel, are among those leading this charge, and since their cause is wildly unpopular, they're hiring their army instead of them enlisting on their own.

All these people that talk nonsense on TV and YouTube, and have no evident logical consistency while advancing authoritarian thought are paid spokesmen. Notice how washed up celebrities in need of more cash often take a right-wing "heel turn" to get in on grifting the uneducated and uninformed, and the only people talking like them for free are members of the working class that have been fooled. You know they've been fooled, rather than genuinely holding those beliefs, because they can never, ever support their reasoning, and nearly always become increasingly agitated when engaged in debate when trying to defend those points only to realize they're completely unarmed.