Streaming could be good but as it is it's just piracy without the RIAA fighting it.
If a band has exactly one fan total who only listens to them instead of getting whatever is left of that person's fees after the platform cut the band will get almost nothing, despite commanding 100% of one person's attention.
There is some advocacy around this that explains it better: http://subscribershare.com/
Let's say there are two total users of a service, you and I for the purpose of this example. You listen to your favorite band one time per month, I listen to my favorite band twice. My favorite band gets 2/3 while yours gets 1/3.