Being German myself I think the Samwers are an embarrassment. Unscrupulous copycats like them should be outlawed by the German startup scene.
I personally think it's distasteful to rip off a website design directly, but if they can launch a proven business model in Europe quicker than the American originators (or because the American company can't/won't go international), why not? Imitation is the greatest form of flattery and all that.
"In Germany you won't find venture capitalists, just capitalists."
And the Samwers seem to have taken this really literally.