I just found yesterday a youtube video related to this topic (also in german). Of course the video is a kind of investigative journalism and maybe doesn't mention all important facts. But if this is the truth, all people who throw away their clothes in container of social organisations like the red cross in germany (also called
Altkleidersammlung) should think about changing their behavior and bring them somewhere else, helping people in their area and don't help any companies making money with all the old clothes by selling them again to poorer countries. The problem with this is, these companies destroy parts of the industry in the countries they sell the old clothes. Maybe these clothes go back again to countries they had been produced before, which really would be crazy.
I prefer to upcycle the clothes by myself. I started to cut t-shirts and trousers to a cord with which I can crochet again something new. Even
Urban Knitting might be a very interesting option.
If somebody has information if the facts of the video are not true or maybe further facts that proof the truth I'm waiting for comments!