We made the suggestion to give an exchange NPC to exchange Runes or anything else for Badges from the minigames.
The team informed us, that this might NOT be possible due to occupied exchange NPCs.
Well, what about adding these badges to HdÜ normal/easy mode Boss drop/loottable ?
As HdÜ norma and easy are only available once per day there is no overfarming of these badges, but another reasonable way to get them.
Also you could add them to Honorpoints (Obsidian) and/or Memento (maybe at HdÜ) vendors.