If you are meaning signature campaign, then some bounty campaigns has a vacancies for newbie, but it is not big money at all. Also you may write articles, make videos and take a participant in social media campaigns even when you are newbie.

There are too many spam accounts being created (as there are no rules against multiple accounts).  So then it makes sense for bad actors to create them and farm the forum by posting low value posts and generating post counts to reach signature campaign limits.  This background noise is damaging for the coin and forum as valuable thread become diffcult to find in amongst the noise and forum performance is impacted by dealing with extra junk.

Just participate in the community, you will gain ranks and then be able to particiape without adding to problems.  There will be other campaigns coming along all the time.

Just enjoy the community a bit, it shouldn't take you long till you are junior member. You can still participate in some bounty campaigns not regarding signature but you are probably able to do twitter, facebook, blog, video, translation etc. tho you will have to wait for these bounty campaigns to finish and payment might be like 1-2months after you do it but it could pay off.

Here is a post that will enable you to understand a bit more about ranks: https://bitcointalk.org/index.php?topic=178608.0

The higher the rank you are the more text you can put in your signature which result in signature being prettier and easier to spot and thats why some campaigns even accept full memebers and higher ranks because with those they can put profile pictures. All in all I do believe that you should be able to find easer campaigns as being member, just maek sure to post at least once a day and be patient.

Good luck!