If the number of partakers isn't an accurate count of the anointed, then how many other numbers are wrong too? It all stems from the integrity of Jehovah's Witnesses, so if some are in effect lying about being anointed, how many other lies are JWs telling?
They shoot themselves in the foot when they acknowledge something like this, but then since they printed in the Watchtower that the number of anointed is declining, and that it is "conclusive proof" that we are in the last days, they have put themselves between a rock and a hard place. They can't say the increased number is true, but when they say it's false it makes them look very bad.
It couldn't happen to a more deserving religion.