Original sentence: Grooveshark is an internationally-available online music search engine, music streaming service and music recommendation web software application, allowing users to search for and stream music, for free, that can be played immediately or added to a playlist.Their audience is growing at a rate of 2 to 3% per day
Edited sentence: As of April 2009, it's audience is growing at a rate of 2 to 3% per day.Grooveshark is an internationally-available online music search engine, music streaming service and music recommendation web software application, allowing users to search for, stream, and upload music free of charge that can be played immediately or added to a playlist.However, concerns have been raised (see criticisms) over the legality of this content with reagrds to copyright infringement.The website also allows users to upload music files on their hard drive to the search database, resulting in constant growth of it's library