I think activists who become popular often have a "dark path" choice to make.
I am not saying #5 is bad (I contribute to a few). I'm saying this is a thing that happens, and it can potentially corrupt the activism. Just like literally anything else, when you get money for doing something there will always be motivation to do the thing primarily for the money.
I think some of the "best" popular activists have managed to at least partially insulate the content of their communications from the money motive, somehow. I also think I've seen several people shift into something like "faith healer" or "quasi cult leader" mode because of the money.