Fastclick, the performance-based ad network that announced a planned $92 million IPO in December, showed ad revenues doubling in 2004, with $19 million coming in for the fourth quarter, earning a profit of $1.5 million. Last year's Q4 showed a higher profit, $2.1 million, despite having about half the revenue, according to AdWeek. The firm paid slightly less for inventory this quarter, still about two thirds of revenues. The company has been investing in yet-to-be-released search bid management technologies.