I can't see any negative trust, lol..
Could that perhaps be because you changed your trust list? With the default trust list, I see you at "Trust: -4: -2 / +0". At any rate, you have valid negative trust from hedgy73, and John (John K.).
Yes this is what I see on my screen you have valid negative trust by 2 people on default trust and only just realized? lol. There are some campaigns you can join with that neg trust but I am not going to mention it on this thread. Please pm me if you want to know.
OP I understand it is a free market and you pay what you feel is right but you should reduce the requirement to get paid 65 is quite a lot imho and will likely take some time for you to get this campaign filled up and doing a good job.