Context: Rocket Internet is the name of the German company operated by the Samwer brothers, who have a reputation of cloning silicon valley's latest and greatest ideas for the German\EU market. Not technically doing anything illegal but certainly not held in the highest regard.
However they also consider their strength to be execution not innovation. That doesn't rule out ideas that seem like "obvious wins" but have yet to be tested.
Edit: Apparently in their mission statement they claim to only use proven ideas, but I still wouldn't do business with them regardless.
