When the JWs make remarks like that, they are using weasel talk in order to try and worm their way in. If events were to progress from there and a member of the public agree to accept the offer of a "free home bible study", they would soon find that all bibles are not necessarily the same.
I well remember what happened when my parents agreed to a "free home bible study" with the JWs. The pioneer brother conducting the study handed out New World Translations to everyone involved, saying that he was "tired of hearing the King James Version always being quoted." My mother was not impressed, being quite proud of her KJV bible - which had originally belonged to her grandfather.
Bill.