No. Obviously German courts are free from US precedent and could theoretically use a layman's definition of "effective" but it's likely that the US lobbyists who wrote the German law, had their shit together and knew how German courts would interpret that word.
In the US, we had the matter of "effective"'s meaning settled way back in the DeCSS case. It doesn't mean what you think it means. It means what they want it to mean, and judges have agreed. That battle is over (or at least until people start taking an interest in their governments and bother to vote against Republicrats).
Don't ever buy (or subscribe to) DRMed content or things that are nearly dedicated to working with DRMed content. Every dollar you spend on DRM, will have a large fraction used to keep the government corrupt, and keep laws like DMCA from being repealed. If you know someone who is thinking of buying a Blu-Ray player or an Xbox or an iPhone or a Roku in the next couple weeks, try to talk 'em out of it.