In regards to the noted lack of other religious declarations in homenodes. It's not too uncommon for non-Christians to be criticized for just mentioning that they aren't Christian. I'm not saying it doesn't happen in reverse, just that I don't notice it quite as much. For those of us who are not Christian, it's often a lot easier to just not mention anything about our religion. I'm the "you believe what you want to, as long as you let me believe what I want" sort of person. I have very little interest in religious discourse these days -- all too often it degrades into slander and name calling.
As far as the original question goes, I'd think it's the Monastery metaphor that may originally attract the notice of many Christians, and it's the content that keeps them here. But that's just a wild guess. ;)
My religion (philosophy, really, since I'm Taoist) has very little to do with my coding, but it really has a lot to do with the interaction between myself and my co-workers. So it's a large part of work, but not an obvious one.