The manager may be new but that does not mean he cannot manage the campaign, so we should not judge based on that. Secondly,  the signature thread specified maximum of 15 posts to be paid $1.5/per post.

However,  you are right that a lot of things are not clear about the signature campaign especially on the hire and fire weekly base on the discretion of the manager. I think they should find a reputable manager to handle the campaign for them. If there is risk, it will be working for one week without pay so only those not in campaign should take such risk.