Much as I believe in the power of optimism and that having 'faith' makes a real difference (as in documented medical outcomes), religion is a multi billion dollar industry, especially now that it is online. 'Nuff said.
I agree with @jpluemer. Years ago, in my fundamentalist phase, I would have hated this movie, and would have hated Bill Maher even more than I already did. Now, I get that Maher is simply courageous enough to ask the questions many of us have secretly contemplated. I like that he approaches the topic from a position of not knowing, although it is clear that he considers organized religion nuts.