It's just less than trivial to get it running yourself.

Reminds me I need to check in on https://Sandstorm.io and see how they're doing. I've tried to install it a couple of times and bounced off of it a couple times, not always due to things that are their fault (i.e., they do sensible things with DNS but my managed DNS provider won't let me set up the requisite records in their "easy" interface, and I'm not quite motivated to go all the way back to running my own bind).