Facebook sees start-ups adding to revenue

Facebook Inc anticipates that start-ups will provide a steady stream of revenue as they use the social-networking service to promote installations of mobile applications.

Deborah Liu, platform director at Facebook's product group, said software developers will probably keep paying Facebook over a long period of time, regardless of the fluctuations of the technology market. Her comments come weeks after venture capitalist Bill Gurley said Facebook could face trouble if it becomes too dependent on ad revenue from start-ups that are overvalued and are at risk of going bust.

"We work with developers, they spend over time, and they are seeing a good return on investment for adding customers," Liu said in an interview when asked about concerns regarding a technology bubble. "They're going to continue to spend over a long period of time."