Quite a bit was handed to him directly, as opposed to him digging things up. He had a built-in following though, and he's obnoxiously persistent.
I don't approve of the way he brought people to harass "witnesses" at their homes, or at work or school games, even though I think some of them are horrible people. If he does end up convicted and gets a prison sentence, I won't weep for him. The First Amendment does have some limitations.
As for Read, the prosecution tried very hard to connect her to witness intimidation, even getting her new phone to review communications with TB. But they were unable to find anything, and because of this I doubt she encouraged those sorts of activities.