Every campaign have different campaign managers and different goals for the company that they represent. The main goal of these campaigns are to provide exposure for the company to a wide audience. People posting constructive content will get a lot more views and that is what these companies wants.

The campaign managers will look for posters that can provide unique content and also something that would stimulate traffic to their threads and their posts. So, if you provide quality content, you would be rewarded with a good campaign and some decent income for your time and effort that you put in to provide that content.