Copyright and its many forms have always interested me. Today I started my hip-hop class for this quarter in my theater training, and our teacher (one of the Electric Boogaloos) had this to say about appropriation:
"Listen, I don't mind if you get inspired by something cool you seen somewhere else, but if you take it, you gotta make it yours."
That's what you should think in your head when someone uses the phrase "transformative use."