Printed literature was the way to preach for a long time--Luther's 95 Theses became the first best seller from the 70 year old printing press to be mass marketed to the unwashed masses-- the profits were immense-- But today, JWs can hardly give away free literature from those rolling carts I see in public places.
https://www.washingtonpost.com/opinions/the-power-of-luthers-printing-press/2015/12/18/a74da424-743c-11e5-8d93-0af317ed58c9_story.html
I probably have the only 1920 WT of this issue in existence- New light!
"Millions Now Living will never die!"