Look. I understand that some Germans were not at all involved in subsidizing erotic call centers, and those innocent Germans should be left in peace. But it's not at all clear how many Germans have been subsidizing erotic call centers, nor how much the German government had a role.
There is not a source I read about Germany as a country did this.
I understand that German people were using those lines and made it therefore profitable but that's not what the word subsidize implies.