The WT is slick but no invincible, the hits that they are taking will eventually produce fruits. More prominent religious groups from the past, today are almost gone. An example are the Quakers, very prominent in American history and with famous members including Richard Nixon; take a look at some recent numbers:
Worldwide: most recent membership count (2012) = 377,055
Distribution worldwide of Friends:
Africa = 52% North America = 20% Caribbean and Latin America = 15% Europe and Middle East = 7% Asia-West Pacific = 6%.
United States: 2007 = 86,837; 2012 = 76,360