Files like this are the engine behind identity theft. Even if the passwords are old, they provide a roadmap for "credential stuffing"—testing the same login on hundreds of other sites.
Downloading or using these lists is illegal in most jurisdictions (including Germany's "Hackerparagraph" § 202c StGB) and can lead to severe legal consequences.
The ".de" or German-centric nature suggests specific targets like local e-commerce sites, German banking portals, or regional streaming services.