Let me answer you how you can join a signature campaign and a little bit about the campaign that you joined as per the link you included in your question.
First, you will be able to join a signature campaign once you become a Jr. Member. Then, you may look for campaigns and ask to join. For example, in the link that you included above - I cannot open it now because it is already full - but I am sure that there will be instructions on how to join in the campaign. It involves replying to the forum with the details they are asking and wearing the appropriate signature applicable to your rank. Wait for the moderator to accept you. Once accepted, you may start posting and replying to the forums. From the Home tab, just find a topic you want to reply to. Bear in mind to read the link of your campaign because each campaign have their own rules. Some examples may include specified number of posts required per week, number of characters per posts, which posts shall be counted and not. Failure to do so may result in your efforts to be useless, be removed from the campaign, or have no pay.
Let me suggest that you really involve yourself in the forums and read through them because that is one sure way for you to learn the way around. Also ask help from whoever shared bitcoin signature campaigns with you!
Its been a while i have been looking for a post, lecture whatever that has to do with signature campaign. I stumbled on this thread via google search. And I followed it up and here I found what I have been looking for.
Thanks for taking your time to explain this, however I plead that you go further by explaining the signature campaign codes, and the part where you said, "wait for the moderator to accept you" Does it mean you have to apply for the particular campaign or is there another forum one has to apply to?
And the last question is, How do I wear a signature, and know that I am wearing one?
Once again thanks for taking time out to explain this to us it was really very helpful as it has been a major area of need for me.