Streaming music service Spotify is offering college students in the US access to its unlimited, ad-free tier for $4.99 a month, half the usual price. The discount can be used with both new and existing Spotify accounts, and its valid for twelve months at a time; Spotify has previously offered university discounts in the UK in partnership with the National Union of Students, and streaming music services have been heavily targeted at college students: Rdio dropped its price for them last year, and services like Rhapsody have previously been offered directly by colleges in an effort to deter piracy.