I second you on this! I have enough Bronze and Silver Runes to make Boosters for a whole year! After making my 1st RainbowAli, months ago, I have received 1 Gold Rune and like you, exchange continously and daily.
Now I've stopped exchanging after the Cloud Sparrow wanted 28 Gold Nuggets!!!!! "No, None, Nothing, Nada!" I said. That was just too much! What I exchange I work for organizing time and energy.. and expect 'a fair exchange'. It's not worthwhile going there for what is given. It really makes me feel bad, sad and unsatisfied and that's not my thing! My kingdom functions perfectly with my Inventory full and ready for events.. without other Rainbow Alis nor the Kiln.