I see this as something not worth giving much concentration on because if you give it a closer look yourself OP, you will discover that participants were not paid for that, instead they were strictly paid on their signature campaign enrollment and the manager does not specifically stated it that if you don't post on their ANN thread you won't get paid, the whole situation here is clear enough to justifies itself as purely inline with the rules, no one is above a mistake but i think the manager is also experienced enough in this field as well.