I think part of the winning formula in this case was that it's relevant to HN - (HN readers are the demo for DomainPolish). I wrote the article because I though

I think part of the winning formula in this case was that it's relevant to HN - (HN readers are the demo for DomainPolish). I wrote the article because I thought it was a cool service, I never expected anyone to read it. I wrote the whole post in 15 minutes, it was a stream of thought that turned out to be relavent to the community.