PatrickHopf is former vice president at Mamma.com, one of the most talked about second tier engines. According to Hopf, about 30 percent of all clicks are disqualified by this process. Hopf described the ecosystem of the second tier networks:
Mamma.com's PatrickHopf describes strategies and tactics to combat PPC fraud. Ask the Search Engine: Coping with Fraudulent Pay-Per-Click Traffic SearchDay, Apr.http://searchenginewatch.com/searchday/02/sd0418-ppc-fraud.html Pay per click search...
Mamma.com's PatrickHopf describes strategies and tactics to combat PPC fraud. PatrickHopf is Vice President, Business Development for metasearch engine Mamma.com, and has led the company's search result placement program since its conception.