Paying someone to troll message boards would be like throwing money out a window.
The majority participants on boards like USMB are usually strong ideologues, maybe passionate ideologues would be a better term. They are on these boards to destroy the other side of the aisle and criticizes the other sides leaders without mercy. No one is going to change anybody's minds. I've been posting on boards like this one since the late 1990s, I have yet to see someone say, "gosh, you've changed my mind". People who post on boards like this don't change their mind, they are here to defend their position to the max.
Look, I'm right all the time,,all the time, yet have I changed anyone's mind? Hell no!