No good CPI system does not exist. If someone offers the possibility of CPI, should this ad be an advertiser. Most Web sites that would like to earn using the CPI, however, does not play fair in the hope that as far as possible, and preferably a short period of time earns. I have a CPI system, and using the script, which can display rotating ads, each candidate immediately start making money. Ads are mixed with PPC advertising, and those 10 ads, which currently is rotated only 1 type of CPI (according to know that has a direct link). However, if you have patience, simple to use direct advertising. You arrange your page for the possible sale of ads (you have to wait for the advertiser when he choose your page).