No - I'm a subscriber to two streaming music services that usually have everything I'm looking for, and when they don't my next source is Youtube. If I find something I like and want to add to my collection, I buy it - usually after I've been listening to it for a while. I buy a lot of music, but it's after I've figured out that I like it and want to have it with me - the music is reward enough.
I'm working on building a service for music discovery actually (http://beathound.com) - it's not a problem that's been solved yet. I use whatever I can get my hands on.