Twitter says no ads in 2009, focused on commercial accounts

Twitter announced on Tuesday that it does not plan to run advertisements on its website this year. This comes after a recent modification to the micro-blogging site's terms of service, which makes room for ads.

Co-founder Biz Stone announced that the company has sufficient funding for the time being and has emphasized that its focus is on improving search functions, adding new features and developing a revenue stream around commercial Twitter accounts. At present, the two-year-old company does not have a revenue model.