It is an intersting move, maybe they are just protecting themselves. Currently as bitcoin is "private money" you are allowed to sell it, but if you are selling in a commerical manner, repeat sales ect then you need a money transmitter license.

ATM operators also need a money transmitter license for the most part.

It is not easy to get  a money transmitter license in Germany, this is one reason why bitcoin.de had to partner with fidor bank to even be allowed, and it is a p2p exchange. This also could be a reason why skrill has its company registered in England but is more or less a German company.