All I know If Newbie has not been able to join the signature campaign must improve to be a member or Jr. Member etc.
There are some bounties that are allowing newbies to join with their signature campaign but it's like 1 out of 100.
The lowest rank that I've seen are Jr. members and I don't know what's the difference between the two as they have the same signature space.
Yes , you are right the lowest rank are the newbies. Can you give me campaign that accept newbie for sig campaign? Thanks.