It seems to me that the majority of those few who
a) Were adults
b) Without *any* family ties to the JW's
c) Possessing a higher education degree
and still decided to become baptized Jehovah's Witnesses did so in circumstances of emotional vulnerability: Either they were emotionally engaged with a member of the congregation, or they had suffered emotional damage (abuse, divorce, loss of a close relative, solitude) and were impressed with the "love-bombing" they've experienced when coming to the congregation. Very interesting - and very telling.
Eden