Honestly what's needed more than a gold sink is trickle down economics. 95% of the population is struggling to make gold while 5% has too much of it.

Events like the last one will slowly do it though. Poor farmers made a lot of gold while rich players lost it opening elondorian locked or trying and missing the leaderboard.

Having 3 different 10 million gold vanities is enough of a gold sink IMO.