Since WordPress burst onto the blog publishing scene, it has been a free service but this status may be poised to change. The company, which took some angel financing, earlier this year is experimenting with “contextual adsense” advertising. Here's Matt Mullenweg's explanation:
In many ways, WordPress adopting some kind of advertising platform is no surprise. With the service growing and investors now on board, WordPress needs to evolve from a cool public service to a revenue-generating business. Mullenweg has talked about his company, Automattic, selling value-added services to WordPress users but that could be a challenge given WordPress users are used to paying nothing. So, advertising seems like a natural way to generate revenue given the advertising market's growth and WordPress's popularity. If Mullenweg can convince WordPress users (like me) that the introduction of advertising will be a win-win scenario, he may not have much resistence.