Microsoft scientists and the researchers at the University of New York have reportedly found that some Internet Service Providers (ISP) manipulate search results (e.g. by Google) and derive commercial benefit from it.
These manipulations of so called malicious servers are difficult to verify, because the modifications are made mainly in secret and used only on a case-by-case basis.
How the malicious servers work.
When users enter their specific search queries in their browser’s address bar, they are redirected to certain web sites with advertising. There may as well be several redirections before they reach their ultimate goal.
The aim of such actions is to generate as many clicks as possible on the advertising of the company positioned there and earn money. According to gulli.com, in total, 349 malicious servers were discovered.