I don't see why we would need a private board for an app thread, who cares if people see our honest opinions on apps.
That only works on apps that are all yes or all no, when an app is highly contested things will be said about the person in questions to convince others for or against them. Thus if they saw those messages and got accepted it would create turmoil in the clan
Thus if they saw those messages and got accepted it would create turmoil in the clan