It seems to me that you have accepted alot of people, whom only post in bounty campaigns and have a low post quality (without any kind of contribution).
It's not too late too turn around and hire someone who is experienced on this forum to manage this campaign. I've seen many services get their reputation ruined because of horrible campaign managers who accept spammers into their campaigns. DT members are not known to like such behavior.
It's your reputation, and i just wanted to know what you might be facing here.
I don't see any member who seems be outright spammy . And if they were, they didn't have any sig attached to them before(because no campaign accepts spammy users now anyway) hence making the point moot("spam" posts without sig are not considered bad in the community).
AFAIK they guy's managing the camp. seems to be trying to save as much as he can(hence the low sig rates), so why would he waste another 100 bucks or so per week to let an experienced sig manager run it? And as for DT member potentially negging the campaign, I haven't seen anyone except Yobit being negged for "running a spam signature campaign" and that too was because the spam was in way too big a scale.
@nexybit, although I know you're trying to save on the costs "Posts that have less than 100 words will not be counted." is way too strict a requirement for a low paying campaign. 100 chars should be better here.
P.S: Am I the only one seeing that the sig is still kinda off?