When I consider the way their articles seem to consist mainly of link bait without substance, I wouldn't be at all surprised to see them disappear within that timeframe. I could swear I remember a time when folks would point to Forbes as a good publication, but I'm not so sure now. Probably a symptom of focusing on ad revenue rather than editorial quality and journalistic integrity.
Yeah, the amount of linkbait that comes out of there makes me feel like they have intentionally targeted HN. After clicking on a forbes link, only to discover it was literally Quora wrapped in an iframe, I stopped clicking. I now just check to comments to see if any interesting discussion actually occurred.