Despite what they believe and what we were taught, the existence of Jehovah's Witnesses (evidently as we now see) has never actually depended upon their being the true religion, having Gods direction, the making of prophesies that come true or in the clarity of their teachings. This has become clear in view of the failed prophecies, obsolete literature and reversals of major teachings.
It's a case of "If you build it, they will come". I someone puts an idea or product our there and sticks with it, eventually they will find a taker. Detroit built some pretty ugly and unreliable cars back in the day but no matter what they built, throngs of people were convinced to pay a lot of money for them and spent years of their lives paying them off.
No matter what JW's do or say, they will always find a following among a certain cross section of the population who want or can be convinced to want what JW's have to offer. I don't think they will ever go away.