trade devidend "work" with normal trade and schould work with rare goods too. But yes its looks like little broken becose first wing what i created with friend didn`t genarete bonus cr for selling goods, so after 3 trips with goods and tests we exit from wing and create new one and trade divident start working with no any delay, after trader selling goods You get info about how much cash You get. When i sold my cargo for about 600k cr he get 30k cr bonus, and when he sold cargo for about 300k i get 17k cr

When You create wings with 4 anaconda 450t cargo space ( with 1600cr profit) You can get 144k cr bonus cash
You can dock to station or You can be outside station and You get bonus cr, this not work when You are outside station space/instance.