According to this spreadsheet All the participants has atleast one negative trust what I can see by default trust view.
I have reviewed all the accepted participants and noticed all the participant have at least2 negative trust from default trusted users. Anyway, the users who had joined on this campaign knew they will get negative trust and even they may get banned for promoting 1xbit like promoting yobit.
Those who do not have prior negative feedbacks before joining this campaign is making a huge gamble because of the high payout and they are hoping that the campaign will last a long time, probably 4 to 5 months unless the forum restricts the campaign, I don't think they will heed the advice here.