If (when) their service gets discontinued you switch to another one; the only problem you would face is migrating your favorites, bookmark, playlists and the like [2].
I don't think this is a good strategy, you are putting yourself at the mercy of content license negotiations that are done by a bunch of idiots with their heads up their asses that you have absolutely no control over. There is no guarantee that the music you "rent" from one service will be available for you to "rent" on another service.
I don't think this is a good strategy, you are putting yourself at the mercy of content license negotiations that are done by a bunch of idiots with their heads up their asses that you have absolutely no control over. There is no guarantee that the music you "rent" from one service will be available for you to "rent" on another service.