Not sure how reliable your campaign managers' decision on selecting the participant. I checked most of the accepted participants and I can see that most of them are posters on basically all the spam thread or low quality thread which you can see on the bitcoin discussion and gambling discussion. All their post are general spam which are mostly just recycled post and sentences that were rephrased to make it look like a constructive post but if you look in it, it's actually not.
The length of post des not mean it's High quality. Post in bitcoin discussion or economics does not mean that their posts are constructive.