What you say is not correct, at least in regard to Germany. This lets me wonder about the validity of your other statements. In Germany, cyber crime is thoroughly investigated and punished, with no exception when your victims are overseas.
On top of that, the excerpt of Germany's most basic collection of laws you have linked () just states that there will be no extradiction to US. This only means that people will be punished for their crimes within Germany and not in the U.S. - but not that they won't be punished at all.