I'd say leaking the tracks is basically theft (Gaming)

by Kahzgul, Sunday, June 26, 2016, 21:25 (3142 days ago) @ Pyromancy

It's not like an information leak. Telling people Paul McCartney worked on a song for Destiny doesn't spoil the listening to the song when you hear it in the game, nor does it take away from your willingness to purchase the game (unless, I suppose, you're some weird sort of anti-beatles maniac, but in that case you'd have heard about the collaboration with Marty when the game came out anyway)

In the case of actually leaking the actual music, you've actually taken the product. That's theft. You took something without paying for it.