I used to have 3 toon's maxed with exotic luck in the bags, but when they added that Drooburt during the lunar new year, I was able to make around 2k gold by donating it all and completing the achievement over and over, which gives you 8 X Red Festival Lantern for every 1k luck converted for which you then vendor for 7.04 silver. It is not a lot but if you have lots of luck like I did, it adds up. It is just very time consuming to do it by hand.