The American Constitution availed men to openly and freely propagate their religious expressions without government regulatory control.
The men of the IBSA and the following JWS organization knew and accepted that available openness.
The men of the WTS made doctrinal proclamations through the literature they sold then were eventually forced to ask for a donation due to tax laws in the US.
I'm in the belief that these men partially believed the doctrines made by past WTS leaders such as the pivotal year of 1914 and partially in acceptance that they were advantageous for their own literature proliferation.
Sometimes to get at the truth you have to use a sharp knife, uncomfortable as it may be.