For the big luck impact on economy, I farmed cata yesterday 4 hours with full group of big luck seen 2 pink drop, neither of them is Coz of big luck proc. Today I farmed cata for 3 hours with full group of big luck without seen 1 pink drop. From my countless cata run experience, it didn't raise the drop rate at all. Maybe it will help in the long term, but economy won't get any impact lately. U can see there's still less than 5 gemstone sword in cs and 1 for gemstone wand.