Their official blog post and explanation: http://www.young-targets.com/formation-of-tech_hub-started/

There's a pretty big discussion/shitstorm going on in the Berlin Startups Facebook group.

The trademark owners claim that they want to use the licensing fees to support non-commercial events, quotation: "I think it's worth trying. If not, there sure will be other ways to finance non-commercial projects. I any cases it's better that it's a trademark of a non-commercial project, than of some cease-and-desist law firm."

I totally disagree with that whole idea though. Makes us Germans look ridiculous :-).