I think I did use Kuro5hin for a time, but if you have seen my writing elsewhere it is most likely LWN or some miscellaneous technical training vendors, both of which I contributed to for a while before my life got a little crazy. I'm actually currently getting back into freelance writing, so while I have fifteen minutes of fame... my first passion before technology was writing and teaching, and I write and develop training on technical topics I am interested in (there's a number of them). Contact info in my profile.
JohnCompanies, the first VPS provider, and the incubator of what eventually became rsync.net, did all of the original advertising on kuro5hin.org. I actually grew the company a fair amount just on the basis of those small ads on k5.
While I was never an active member of the community there I had enough random exposure to it to absorb a little bit of what went on there...
At one point when funemployed and living in a better DC market I considered trying to start a VPS operation but decided against it since the market is so hypercompetitive. I guess I'd have been in good company. Now that I live in the forsaken desert I have to ship my hardware to a different state to get a decent colo rate, so that's right out.