Good news, Rdio loyalists: Spotify users aren't the only ones who are now able to stream music for the unbeatable price of free. Presumably as a result of the Cumulus Media deal revealed earlier this year, Rdio customers can now listen to the entirety of the service's streaming library via a desktop browser for zero cost, as long as they're willing to sit through a few ads. According to Rdio, those interstitials will consist of "new feature announcements, messages from partner brands, notifications about exclusive content and other helpful tips." Of course, if commercials aren't your thing, you can still cough up $9.99 a month to get rid of them courtesy of Rdio's Unlimited service. Combined with free mobile stations and lots more supported countries, Rdio is certainly helping to make the streaming music space a whole lot more competitive.