>> you have done work on the different streaming services between pandora and spotify and audio -- rdiomore likely for success? >> i will go from one to the next as fast as i can whenever i run out of the limit on how many songs you can listen to before they do not let you skip anymore. thinks aboutandora the best way to integrate ads into the listening experience and to let you listen for free. different than spotify. spotify want you to pay that monthly amount whereas pandora wants you to maximize advertising revenue knowing that people will be listening and using the services more. maybe advertising does have a bigger potential than the number of people that can based -- they can get to sign up. >> i am a lean back user. i am not good at building my library. isthe number of listeners slowing down and engagement is increasing. the company is facing a different challenge. initially the challenge was to get people to use the service. they are reaching some limit and the question is how they can get listeners to listen more. >> we will be back talking about facebook's $19 billion purchas