Btw it's not a sink issue at all
The items are worth are equal to the time you spend farming for them and how many ppl can do the farm even if you spend 1B on a a sealed card
hypothetically if it takes me 1hour to farm a contaminated wanderer card which cost like 100m and need average gear to farm why would i sell it for a 100m after the change since getting that amount require low gear and less than 30min
It's about how easy is the zeny is to get not about how much zeny is sinked