I don't know much about that.
In the case of the Early Rain church, I know that they and some Christian groups have spoken out about the case of the Uighur Muslims. I think that's important. That community often doesn't have a voice of its own within China because of the amount of suppression they're under. When these Christian groups can speak up for them, that helps amplify their voices and it extends that, because they're also facing religious persecution. I've seen some of that.
As to how effective that is, I can't really say. Maybe it has raised more attention and more people are concerned about it.