Maybe Spotify is greedy, but so are we. I used to spend $5 to $25 for a CD back when that money meant more than it does now ( I used to buy records, too. I've even had a few 8-tracks in my life ). Listening to music today is cheap.
I'd still love it they lowered their price. I might even cancel my subscription if they don't. But I don't blame them for trying to make a profit.