On March 19th, Google manually penalized one of the most well-known guest blog communities online – MyBlogGuest – for engaging in a link scheme and violating Google’s guidelines. They also announced that users of MyBlogGuest could be receiving penalties.
It seems unfair to penalize guest blogging. Google cannot manually judge the intent of every guest post on the Internet. Not all guest posts are intended for link manipulation. After all, guest blogging is done for very legitimate reasons, such as sharing expertise or opinion in front of a new or larger audience. Even Google’s blogs accept guest posts.
Regardless of what Matt Cutts or the SEO community says, here’s the real reason MyBlogGuest was penalized.
EDIT: As of August 2015, Google has used this same process to set expectations and trigger behavior for mobile, doorway pages, furthering HTTPS, and more. It’s an important concept to understand so that you are neither cynical of Google nor paranoid of Google’s changes.