Patent ID: 8666811

Claim:
A method, performed by one or more devices, comprising: providing, by one or more processors of the one or more devices, a group of advertising links in association with a document, a related advertising link in the group of advertising links being related to a content of the document, and an unrelated advertising link in the group of advertising links being unrelated to the content of the document; determining, by one or more processors of the one or more devices, a first rate at which the related advertising link is selected; determining, by one or more processors of the one or more devices, a second rate at which the unrelated advertising link is selected; determining, by one or more processors of the one or more devices, a result of comparing the first rate, at which the related advertising link is selected, to the second rate, at which the unrelated advertising link is selected; and determining, by one or more processors of the one or more devices, whether illegitimate advertising-related activity occurred based on the result of the comparing.