I believe the author just gave this as a popular example where tracker music can be found. Not a lot of people are fully aware of the "demoscene", where this music/tech is still quite popular. The cracker scene and demoscene have some common roots (and I think still some personnel overlaps), but I met/know plenty of people who aren't into stealing/distributing cracked software, but are very much into the demo scene, producing wonderful pieces of art without breaking any copyright or other laws ;-)

If you have no idea what I'm talking about (and mind that I'm not involved with either scene), check out https://en.wikipedia.org/wiki/Demoscene