Good post.
People who may be interested in the witnesses who stop at there door would usually want to use there own bible to see what the real truth is. So this offer would appeal to many. The person finds out later when attending meetings , what an " accurate " translation the NWT is, and would start using it to fit in with the others. I tried to bring my NIV version to the hall ( large leather bound) and got some strange and unapproving looks from people. They never did say anything though. How could they when there is no "rule" against using other translations.