That is most likely due to GEMA (the german collection agency) having very high fees for internet streaming. Same problem in Denmark with their collection agency.
Exactly. GEMA charges a minimum of €0.1916 ($0.2626) for each streaming of a song up to five minutes. Compare that to the £0.0022 ($0.0035) charged by PRS for Music, the equivalent performing rights collection society in the United Kingdom.