I think the rewards for newbie and jr.member's signature activities are very bad now, usually requiring 10 POSTS, but only 1 stake, and there is risk of no payment.
Its just being equal for everyone. As for the judgement of the people in this community high- ranked members means that he is trusted and can wear bigger and colorful signature designs, additionally high ranked members can also wear an avatar that makes it easier for people to see.
Actually almost of the campaigns have a risk of no rewards especially if you did not do some homeworks before joining.