San Francisco--Flycast Communications Corp., San Francisco, said Monday it will provide cost-per-click direct response advertising services to marketers. The advertising network will charge 40 cents per click for banners placed across participating sites, and 60 cents per click for advertising targeted at specific categories. The pay-per-performance move underscores Flycast's effort to differentiate itself. Unlike 24/7 and DoubleClick, which specialize in large campaigns on heavily-trafficked sites, Flycast allows low-traffic sites to make an advertising buck when it delivers targeted users, said Lyn Chitow Oakes, Flycast exec VP and COO. The cost-per-click model will be available immediately to low-traffic, specialized sites.