The licence market is protected by the GEMA presumption. The income of composers, authors and providers (labels) of GEMA licences is protected. Where's the threat? They are "threatened" by new providers, say authors of works under Creative Commons licence. Those are constrained in selling their licenses. Free licensed songs would represent a product substantially expanded by valuable properties. It is no substitute product but nevertheless a competitive one.
Tag / collection societies
The news of Deadmau5 joining Kobalt once more has shown the attractivity and strength of Kobalt. Trent Reznor, Dave Grohl, Paul McCartney, Skrillex, Lionel Richie. All of them are with Kobalt now. But actually, there's much more to it. Kobalt is the first player to change the music licensing business in a groundbreaking way. In a bold move, a commercial company founded a collection society.