The pricing gap is still huge between hosted and enterprise. For 25 seats, it's $600/yr hosted and $10,000/yr enterprise. Hopefully Atlassian will drive them to fix that.
Working in an environment where hosted solutions simply aren't an option, I am grateful GH:E is around.
The actual cost per year ends up being fairly negligible when we factor in the nearly 100% removal of administration overhead that our previous VC options required.
That may have been the case initially, but I get the impression they take it very seriously now - they've hired a number of people to work on it full time, and I think it makes up a decent chunk of their overall revenue.