I would say yes as it's possible to earn without flying. And if you also go shopping in Germany get the payback card. Payback points can be changed directly one to one to miles and more. So either be lazy and collect miles at coop or be cheap and collect miles at Rewe (almost always 10x points per euro) and other shops in Germany. Either way a year of smart shopping will get you nice bank of miles and who doesn't need food anyway?!