Pete and Julio,
I know there can be an inherent tension between an artist or a small label's rights and a listener's desire to hear as music as he or she can for as cheap as possible, and that YouTube for some fulfills that need alone, while other use it as a basis for experimenting with purchasing new music. Ultimately, if musicmaking can no longer pay for itself and, instead, musicians continue to lose money paying for mastering, licensing of photos and artwork, you will have fewer musicians able or willing to do this at a continued loss and I think the pool of available music will gradually become the poorer for it. If listeners truly respect the musicians whose music they like, they should pay for it, unless the musician chooses to make it available for free. I try to balance my pay releases with some "free" material, such as my "Seeds of Memory" EP on Thomas Park's Treetrunk netlabel, as a way of giving those unfamiliar with my work a taste of what I do.
I buy quite a bit of music, physical and virtual, so I try to put money where my mouth is, as I think it's the right thing to do.