For context, from the court ruling (BGH, DeepL translation):
Originally, it was envisaged that all services provided by the DWD to the general public for public dissemination via modern means of communication, such as mobile devices via an app, as specified in Section 4 (1) DWDG should be free of charge (Explanatory Memorandum to the Government Draft of a First Law Amending the Law on the German Meteorological Service, BT-Drucks. 18/11533, S. 22). The Bundesrat has commented on this and raised competition law concerns about the tax-funded DWD making meteorological and climatological services available to the end consumer free of charge, because such a free charge constitutes an impediment to established private-sector providers and erects barriers to market entry for new providers or new offerings (explanatory memorandum to the government draft of a first law amending the law on the German Meteorological Service, BT-Drucks. 18/11533, S. 25). The version of Section 6 (2a) DWDG that has become law is based on the resolution recommendation and report of the Bundestag Committee on Transport and Digital Infrastructure (BT-Drucks. 18/12836, p. 2), according to which not all services provided by the DWD to the general public pursuant to Section 4 (1) DWDG should be free of charge, but only those pursuant to Section 4 (1) Nos. 3 and 7 DWDG.