I pay $10 per month for Spotify. I listen to it so much that if I bought the songs I listen to in a month, I would have 100 cds per month, or would need an extra memory card each month.
Plus, if I ever decide to not pay, I can still listen with ads every 5 minutes.
In any event, you are the exception and not the rule. Spotify only has 15 million paying people World Wide. That number sounds big until you realize the world is over 7 billion people.