And if you are here only for the campaigns, you are cancer for the forum already
If it is cancer, the forum would disable it. It is opened for good posters but the forum does not manage campaigns. It is up to applicants and campaign managers. Applicants need to show managers that their post quality is good enough to help company achieve what they want.
If you don't spam, managers will welcome you.
The purpose of the forum
This forum exists to provide a platform for the free (but ordered) exchange of ideas. If you have an idea to express, then it is probably possible to do it here as long as you follow the rules.
A lot of people come here primarily looking to make money. The forum administration is very happy that people are able to use the forum in order to better themselves; indeed, one of the reasons for Bitcoin's creation was to break the artificial barriers which prevent so many people around the world from attaining prosperity. However, if your attempts to make money conflict with the forum's primary goal of enabling discussion, then you are swimming upstream, and you will not be sucessful in the end.
If you view the forum as some sort of "job" where you complete some basic tasks and get paid, then you will almost certainly be disappointed, and the forum administration will not be sympathetic. If you do make money using the forum, then it will be through innovation and entrepreneurship, not any sort of mindless busywork.