Stop flaming his rate,he can pay what he wants. It's his campaign not yours. And no, you don't need to state that it's very low because we can all see that.
He is entitled to set any rate he wants, no one is arguing that. The issue here is that the OP is vaguely written, vague enough that people might sign up for the campaign under false expectations that they will receive a sizable payment per post, when in fact they will receive barely anything. This is quite deceptive in my opinion, the OP should be more explicit with the fact that the rates offered are not per post.