You can participate in the forum, being a good member, help the others and join signature campaigns. If you are good member and have good contributions, you sooner or later will be part of a good paid signature campaign. Your rank will be a top that brings more payment for your posts too.
The signature industry can be shutdown by theymos anytime.
I'll tell you what I believe about shitposters. Yes, they've come here to shitpost in order to get paid. Although, I see that the problem isn't the shitposters, but those who hire them. I see some campaigns that pay per post, these are the worst. Why? Well, all the shitposters go there, it isn't always necessary to have a high rank, member and up is accepted. They don't care if you create quality posts at all.
Signature campaigns that ask from the member to create constructive posts are the ones that make the forum a better place.
Also, they are the ones that pay more ^^