Because Other manager could fruad but Due to his DT2 achievement, people trusted him and continue their work.
You are confused on this. If people trust someone to work with them it is usually because of the green tags, which have nothing to do with the DT status, and which is also difficult to check if you are a newbie, but green tags can be seen right away.
Apart from this, what do you mean "fruad"?
Would like to share a opinion what Jawhead999 wrote me earlier in this thread.
It's because there's a difference between an campaign manager without reputation and the one with reputation. Campaign manager mostly focus in counting the participants' posts/verify the application and distribute the reward if they have it. A campaign manager without reputation is more likelier just want to exit scam.