I have no object to the idea of "amicus curiae" either. And I know it is a legal means to support self interests. But what I do object to is the Watchtower's insistence that its members be entirely separate from those whom it classifies as "Babylon the Great." Yet, it did not hesitate to support the efforts of Jimmy Swaggart Ministries to sell literature to save its own skin. I wonder if an individual JW was found to be supporting any other religion even in this indirect way what would have happened?
I knew of one JW who had a security business that serviced a church. The elders insisted that he drop this church upon the threat of disfellowshipment. This person tried to reason with the elders that he had legal obligation (contract) until he could find another security business to take over. The elders gave an ultimatum of dropping the business within a few business days. Being impossible to do, this person was disfellowshipped.
The only reason I give this example is to show how exacting the Watchtower requires its own members to obey the rules but feels free to pursue any course that protects its own business interests.