I think we may be over-estimating the receptivity of even dedicated readers to the Watchtower articles. Judging by the sleepy state of local JWs, the Watchtower's most likely impact may be at most yawn-inducing.
Remember, even when hearing information read out loud, there are lots of other more fascinating places one's mind can successfully go, rendering the information being read out as little more that "Jehovah blah, blah, blah, blah, and "vital that you" blah, blah, blah...for family worship blah, blah, blah, as we are deep in the end blah, blah, blah..." Next.