While I think it is good for both Germany and students, it probably has a bit of geopolitics mixed in. All those young people, if they return to their home countries, will be naturally more oriented toward German products thus indirectly making German economy stronger. I saw a similar theme in Russia, where there is even a specialized university for this [1] [1] https://en.wikipedia.org/wiki/Peoples%27_Friendship_Uni…
If you're Adidas, why the hell go through this hassle and conspire with > to use the german education system as a proxy for getting a little bit of good PR - not even for your product, just German products in general.
If there's a geopolitical factor involved at all it's inter-cultural relations, which for a country that ruined most of Europe once is a rather good thing.