I think your post could be misleading. Iirc there are three categories, drinks, food and milk-stuff. So you can absolutely compare frozen pizza with hummus, and maybe the frozen pizza has more protein and the hummus more fat.
The algorithm is on Wikipedia
Ps: I might also be wrong, but this is how I remember :)
Iirc gibt es bereits Urteile dazu - vllt nicht in Bayern aber in andern Bundesländern, und die Besitzer mussten zahlen.
Das waren aber eher 500€ nicht 500k€