Signature campaigns are not a feature of this discussion board. They are independently managed advertising campaigns. To learn about a signature campaign, all you need to do is to read the instructions on how to participate on a particular campaign on the thread where it is running. There are no tips or tricks to joining or earning more from them. If you are posting the way that you are expected to post on the board, then a signature campaign is just bonus monetization of your post. New and running signature campaigns can be found on the Services subforum of the board.