Yes, I'd have to agree that fear plays a large part- after all, the org makes such a big deal of the 'vow', the new status of 'baptized publisher', and of course, ONLY THEN are you now in line to receive Jehovah's blessings as a 'dedicated, baptized witness of Jah'- you are 'greeted' at the meetings, of course you can feel them all standing back to actually see if you will turn out to be ONE of them, not quite accepted yet
And then during the 'would-you-welcome-a-visit-free-home-bible-study', you are repeatedly shown the United in Worship book as well as many, many WT articles that make the 'dedicated, baptized' part very clear [ie: if you're not one of us, you will die]... "Oh my god, you mean I'll die at Armageddon if I'm not a baptized JW?? QUICK- WHERE'S THE WATER?!!
I guess this had an impact on me, since without any family, I was alone & 'looking for a home'/somewhere to belong- the JWs made me feel I would have all this family & friends (fellow fruit-pickers of the New Order)