The leader of Google Search Quality Team, Matt Cutts, has announced on his Twitter profile to take actions towards two Polish link exchange systems.
Cutts does not reveal specifically which systems he is considering. It is only known that the team responsible for the quality of results in Google search came across them while carrying out comprehensive measures aimed at German systems of this type.
These are not the first steps of Google to limit the effectiveness of websites and agencies which use black SEO methods. Previously, Google actively fought against this type of activity in France, currently its attention is focused on Germany.
Two years ago, Google removed from the first few pages of search results links to several Polish sites for nearly a month (for example: Ceneo.pl, Nokaut.pl, Tablica.pl, Skapiec.pl and Fotka.pl). According to Google, they were benefiting from link exchange systems.