I reviewed [this][1] answer and flagged it as spam. I see on my flag history that it was declined with the comment `a moderator reviewed your flag, but found no evidence to support it`. The answer has since been removed. Why was this question not spam? Should I have flagged it differently?

For those who can't see it, it was basically "I wrote a blog post about this. Here it is."

  [1]:http://superuser.com/review/first-posts/260381