This is not how signature campaigns are working you need to be active and reach a minimum amount of posts every week/month in order to get paid.
If signature campaign owners wanted viral/spam threads they could easily create many of them and save many Bitcoins every month.
Yes, and i think the OP still don't understand about signature campaign on bitcointalk, i think the OP more suitable for joint on advertising website on internet although i am doubt there are people from bitcointalk who will use his service.