@Logicus,
maybe more atheists write. I do religious arguments and theories, but, I mean, I'm also an author, and plagiarized too so I don't always comment.
Religious theories are "in demand" by society; people pay money to read them, unlike atheist theories. Perhaps that's why people feel more free to share their atheist or scientific or well established views because there is nothing special about them; usually they are well established things.