Web Science/Part2: Emerging Web Properties/Web Search Ecosystem/Understanding the Problems with Click Fraud/quiz

{Who might have interest to click on certain advertisements without having a real interest in the advertised product or service? + The publisher - The advertiser - The ad agency - The customer (person who is just surfing the web) + The competitor of the advertiser - The competitor of the publisher + Friends of the publisher
 * type="[]"}
 * even though click fraud on the short term brings revenue to the agency it will result in a lost of trust on the long term

{Who suffers from click fraud in the above mentioned sense? + The advertiser + The ad network - The publisher - The customer (person who is just surfing the web)
 * type="[]"}

{Which payment models can be attacked by click fraud - Cost per lead + Cost per click - cost per mille
 * type="[]"}

{Does click fraud only consist of fake clicks on advertisements? - Yes! That is the only option how click fraud can exist + No! There exists also the possibility that the publisher simulates clicks with fake referrers on the advertisers web site.
 * type="[]"}