Well, I am pretty sure that there isn't but after checking an overview of signature campaigns (https://bitcointalk.org/index.php?topic=615953.0) I found one. Whyfuture offers a signature campaign for newbies and it is around 10 cents a post with a maximum of 40 posts. Currently there are 6 spots open for newbies to join their campaign.

On a side note, I would recommend you leveling up your account before joining a signature campaign, since 10 cents a post is barely anything. You can receive a max of 14 activity per week and one post equals 1 activity. Then for 30 activities which should be 3 weeks on the forum, you will be Junior member and you can coin 777 coin which offers around 15 cents per post with 80 posts a week.

Would recommend you also make good quality posts that have good grammar and only then when you get to full member (120 activity) you will be able to join better campaigns and when you get to senior member (240 activity) there will be campaigns that offer pretty good rates.