or, even easier to understand analogy: Daniel is the person on the photograph, Spotify/Instagram are the photographers and the hacker is the person who just stole the picture.
(It's not perfect, but it's probably as close as you're going to get)
So it's more like Daniel is a supplier of zinc (and just so happens to give that zinc away for free) to a battery manufacturer.. Who sell batteries to Spotify, who manufacture cameras?