Pandora: The Music Genome Project

I heard about Pandora from Kamo-C.
It is like a new style of internet radio.
Putting a keyword like an artist name or a song name, It streams songs related to the keyword.
It also shows link to iTunes music store and Amazon.com to buy songs reccomended.

I scanned some songs, it's useful.
But it suddenly requires to create an account. I am wandering if I will make an account.
Cuz there was a term that there is a possibility to be a pay service in an agreement.

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