"Finally, despite all the huffing and puffing about Russia’s purportedly massive effort to influence the election through social-media ads, the grudgingly surrendered discovery indicated that many of the ads violated no American laws and cost pennies. Assuming for argument’s sake that at least some of the candidate ads and rallies fell under Federal Election Commission reporting requirements, the defense contended that total expenditures for such activities amounted to less than $5,000.
2
With the judge trying to push the case to trial this spring, the possibility of humiliation loomed. This past Monday, when no one was watching, the Justice Department finally — inevitably — pulled the plug. The cases against the companies were dropped. The sympathetic New York Times reported the prosecutors’ fig leaf: The defense was “weaponizing” the case “to gain access to delicate information.” It’s the kind of claim the Times would ridicule were the paper not so invested in the Trump-Russia narrative. In point of fact, the defendants were demanding the legal right to discovery that Mueller’s prosecutors automatically (if unwittingly) triggered when they decided to file an indictment."
https://www.nationalreview.com/2020/03/department-of-justice-dismisses-robert-mueller-charges-against-russian-businesses/
Mueller spent three years and $millions for what? He found absolutely nothing to what he was tasked to investigate.