This isn't rigorous of course, but "free speech" has come to mean oligarchs and corporations more-or-less outright buying politicians and supreme court judges, and media that's limited to touting some oligarch's best interests, and carrying very invasive, targeted advertising. When ordinary people do manage to offer up an opinion on a larger scale, they're cancelled or worse, doxxed and targeted by something like Alex Jones' or Trump's armies of followers.