Santa Clara, Calif.—A large number of U.S. Internet users say they are fed up with “irrelevant” ads and will ignore a company completely as a result, according to a study by marketing analytics company InsightOne Inc. According to InsightOne's “2013 Bad Ads Survey,” 88% of U.S. Internet users said they have been “flooded” with online ad spam. Also, 43% will ignore a company completely after seeing two irrelevant ads (in the form of either online ads or spam email), and 23% will do so after seeing just one. The InsightOne study was based on an online survey of 2,111 U.S. adults conducted in February and March.