I'm playing my first game with CK2 Plus installed (and very pleased with it so far), but I have a question about the new factions (Glory, Prosperity, etc). Why would I want to join one of these factions in the court of my liege? I can only think of a couple of reasons: because I want to be appointed to a council position, and joining one of the factions would increase my chances, or because it looks like a faction is heading for revolt and I want to be part of it. Are there any other benefits, either for joining one of these factions or starting one?