I agree. I made one purchase and all the add based boosters are gone. Hate it. I'm now on the same level for days. If it's a hard level there should be some way to beat it without having to purchase extra gold bars.
I'm tired of playing the weekly game and getting the same players on the same level each week which is a low level and I'm over 10000 where the levels are harder to pass and these players get 50 levels the first day. We should compete against players on our own level or close to it.