Spotify has opened up its inventory to programmatic media buyers with a private marketplace (PMP) offering after experimenting with the offering since February this year, as the music-streaming service aims to further monetise its 75 million-strong user base. The music-streaming service, which has been doubling down on its advertising revenue in the last 12 months, and as of a few weeks ago it began offering its PMP services to advertisers, according to Jana Jakovljevic, Spotify, head of programmatic solutions.