This penalty is actually caused by manipulation of back links that favors companies in search results. Many Webmasters often break Google's term and condition by adjoining links and this will arises to penalty if Google discovers. But due to the Google penalty, Webmasters is eradicating link requests to avoid penalty.
Websites like MyBlogGuest is now facing penalty from the Google because of its manipulative methods which resulted to Organic Traffic Flow. It also result to low search ranking and completely removal from their search engine. That's why Google is constantly updating to avoid those links building from dominating search results.
According to Matt Cutt, head of Web spam team at Google and a software engineer, he agrees that the said network will go for penalty. However, there are approaches to prevent fines such example include the link removal request from Webmasters which found to be successful. But this requires a lot of time and effort.
This link removal is a new link building in which one will get the webmaster to where you are sending the request in order that your request will be read and then removing the link; although this was perceived to be insulting and negative. Some companies however learned a creative pattern with their link removal request.
In addition, many service firms find reasons behind penalty of such website and then finding solutions to recover from Google penalties. Also formulated methods and was proven to be reliable.
A free reminder of not leaving a comment with hidden link in comment section is now promulgated because this is no more allowed by Google.