Problem with stake is they allowed negative trust user to join on their campaign if they changed their rules to make it more stricter to the user who got bad status in this forum maybe it could lessen the spam happening on this forum.
Maybe they need to change some of their rules so that they can fit in the taste of majority.
Those who are participating in this signature campaign post such a huge amount because they are getting paid for that post as well. This situation can be seen if the company gives more importance to quantity than quality.
If they wanted to keep this campaign spam free then they would have implemented strict campaign rules earlier. They should change their rules to make this campaign more acceptable and stop encouraging spam posting.