efamous looks like a typical ad network, but I guess they passed PageRank through their link network, which is against Google’s guidelines. Cutts also said they went after another “German agency network,” but did not disclose which one that was.
Here is Matt’s tweet:
Today we’re taking action on a German link network (efamous) and a German agency network that violate our guidelines.
— Matt Cutts (@mattcutts) March 14, 2014
A month ago, Google penalized a German agency and their clients for unnatural links. Matt Cutts has specifically been giving Germany warnings about their use of links to manipulate the Google search results.