What are the minimum requirements for selling your signature space to advertisers? I'm curious as to how this actually works and if you actually get paid? All it basically comes down to is, your promoting they're services right?
Generally you need to be a member on the forums for at least 4 weeks plus one day and have at least 30 posts. You will also have to post at least once during each of the two week windows that you are a member.
The above will qualify you to be a Jr. Member and the campaigns will pay the least although most campaigns will not allow Jr Members to participate in a signature campaign.
In order to become a Member you will need to do double the above, members will earn a little bit more then Jr. Members. Being a member is usually the lowest rank to qualify for a signature campaign.