Dating is dead blog
Matt Cutts just declared guest blogging dead: Okay, I’m calling it: if you’re using guest blogging as a way to gain links in 2014, you should probably stop. Because over time it’s become a more and more spammy practice, and if you’re doing a lot of guest blogging then you’re hanging out with really bad company. Every technique has to adapt over time with the competitive landscape and the algorithm.
Guest blogging may be on Google's radar, but I wouldn't close the coffin lid just yet. You could substitute almost any SEO technique into this sentence, and it would be true: Over time it’s become a more and more spammy practice, and if you’re doing a lot of then you’re hanging out with really bad company. If an SEO tactic works, then it will get more and more spammy with time; there is no spam-proof SEO technique.
Likewise, marketers always need to focus on long-view quality over short-term effectiveness, regardless of the technique.
But just because spammers start doing something doesn't mean you have to stop.
(But somehow I doubt the spammer kings are taking Matt Cutts’ advice to heart.) Google can’t algorithmically differentiate between guest blogs and other kinds of articles.
Blogs and websites aren’t legally bound to disclose that anything they publish is a guest post or not a guest post, and in some cases it’s just a matter of perspective.
Think about it – a lot of the content that appears on high-quality news sites like the New York Times, or extremely popular, high-ranking sites, like the Huffington Post or Buzzfeed, is created by freelancers.
If you author a bylined article for a site that you don’t own or that doesn’t employ you full-time, is that a guest post?
The categories are murky because we only think of it as “guest blogging” within the SEO industry; it’s not a term from the world of journalism.
There's no foolproof way for Google to determine the motives of any given author, whether they wrote and published something for links, exposure, money, or pure altruism.