In the so called "management" level some people should got fired just right upfront a deal or deadline to rip their bonuses.
While I was not involved personally, I often hear and read about this and it looks to me that competing companies did/do it the exactly same way, not only the Samwers/Rocket.
That's why the "German startup industry" is broken. If you can only clone ideas, twit employees and (as someone claims) rip off dumb billionaires, this should not be a role model of entrepreneurship on HN.
Because of their large home market, American web startups can grow to considerable sizes before having to worry about multiple languages, multiple export rules, multiple tax systems, multiple consumer protection regimes, multiple payment systems etc. That is a huge advantage that American companies have over European startups. Rocket Internet and their like are levelling the playing field a bit.
All business ideas are to large extend inspired by others. Maybe some of the companies the Samwer brothers "cloned" were truly first in their field, but if they had taken the German market serious the Samwer brothers wouldn't have had a chance. It's their bad.