My question is why do members move from one campaign to another? I will not mention names of some that I have seen move from campaign to campaign every time there is opening so no one feels am attacking him.
Usually it goes down to trying to get a better pay rate when the opportunity presents itself and just for the record it's not against the rules 
!But back in the day, some managers would not entertain such users as it meant more work for the campaign manager in recruiting new members whenever an opening is made available..and to avoid such campaign jumpers a soft ban was made to discourage this habit
What makes members move everytime? I need your contribution on this to make me understand it better.
It can be any of the following reasons:- freedom of which boards one's post will count
- better pay per post obviously
- bonus system for best poster
- likelihood for a campaign to stick around for a long time etc