sometimes when the org, gets into a 'new' area, there can be a burst of energy at the newness,,new hopes,,new friends, love bombing and much, much forgiveness. After awhile, tiredness sets in, disappointments, realities of disfellowshippings, over demands of the org life. as said, worse thing for a cult is: TIME. No doubt the WTS will burn out even faster those in foreign countries if third-world. Japan had an amazing growth years ago,,slowly and steadily decreasing.
A cult needs 'new blood.' Or it gets meaner and more demanding like a beast.