@Planet13 It's a general-topic writers' community. People write about whatever they want to write about.
The hardest thing over the years has been to keep the link-builders at bay. We've disallowed posting articles for link-building purposes since the beginning, but one man's link to their personal blog is another man's link to their affiliate-funnel-MLM-Blogger site, so it's not so easy to police. I suspect that there is a link-graph somewhere which shows that we have articles which link to not-so-nice neighborhoods.
We've used every method we can imagine (including constant human review) to weed out the link-builders, and I'm certain that our site is cleaner than the vast majority of similar sites, but that's apparently not good enough.