Taking a reflective look back onto the founders of the JW religion such as C T Russell and J Rutherford we can see very opportunistic people who were avowed to themselves more so than being actual true bible interpreters and adherents.
Indication of that is just how closed in these men were in their individually devised theology such as Pyramidology, End Times doctrine, Jesus has returned and so on, where there was no effort to substantiate these claims from outside sources by other Christian religious organizations .
C T Russell was not an trained bible theologian by any imagination he just absorbed any outside information that he thought was engaging or provocatively interesting and went about publishing what others had found or expressed.
J Rutherford was one these people who was lured into what Russell was preaching and saw what the WTS was as a publishing house and grab it including the money that Russell had put into it.
The literature circulation and distribution continued on from him, what is realized now is the WTS/JWS preaching Gospel work is not an faithfully accurate preaching according to Scripture.
More or less the WTS leaders created a working cult around its own public sales representatives in the pretense of preaching the Gospel of Jesus Christ.
Opportunism is the conscious policy and practice of taking advantage of circumstances – with little regard for principles or with what the consequences are for others. Opportunist actions are expedient actions guided primarily by self-interested motives. The term can be applied to individual humans and living organisms, groups, organizations, styles, behaviors, and trends.