Those stupid prison -persecution stories serve one main purpose:
To guilt those not imprisoned or actively being persecuted into appreciating "Jehovah's loving provisions" by regular attending meetings and partaking of all the wonderful "spiritual food" given in the form of WT literature.
PS - One of my uncles has a prison route. He acts like he's back in the 60's/70s during the Vietnam war.
eta: I'm not saying that those imprisoned were stupid. They were deceived. WT only cared about them insomuch as it served to drum up the persecution complex among the JWs.