[mxuribe]

I believe, really, its more about being indie and such. Its the same reason many people can just run gmail - or google apps for your domain - as opposed to the heavy-lifting of running your own email server, etc. Not like I'm an expert, but running one's email - and ensuring high degree of deliverability nowadays - is quite difficult. There are those who choose to run something on their own, maybe to learn, maybe for privacy's sake, etc. I'm sure those who do so, dive in with their eyes wide open. ;-)