You probably don't. Not every service is made for every (potential) customer. Rdio/MOG/Rhapsody are for a segment of music listeners that like music enough that they are willing to pay ~$120 a year for unlimited streaming but not enough to have the really obscure tastes that those services don't provide. Google Music, Amazon MP3, MP3Tunes and other "locker services" are for people who want to stream their music, but don't buy enough to warrant a monthly subscription.
I assume both Amazon and Google want to acquire the licenses to do what Rdio does, but what they do that Rdio doesn't is allow you to play songs that aren't licensed for streaming services. Also, they playback your songs at whatever bit-rate you uploaded them at (which might be consider a negative when listening to music over a cell phone network).
I am a huge fan of rdio and use it daily. However my collections of live shows and misc stuff will never make it up to my rdio account as of now. Thats a +1 for a music locker service.
