I’m from Germany too. Is it really?! I had never heard of that. It can’t be a thing inside cities though, can it? I honestly can’t even think of a place where it would make any sense. Surely shops that are located outside dense urban areas would try to make sure they have enough parking space anyway.
While that does seem to make sense, in my opinion it really just gives people more incentive to use a car. If you ban wild parking completely, that might be a different story. But just creating more and more space for cars is not going to solve the problem. The problem is that there are too many cars in the first place.