[Illusion]

Gave the thing some time, just my few suggestions for the future full release:

Have the inventory viewer for the feature just be our inventories, allow us to click an unlimited amount of items then click accept to donate all of them for inventory cleaning.
For wonder trade just show a limited version where you just click the item you want to trade and click accept.

So if this feature goes on for a long time, basically the dumpster will be loaded with items because there's virtually no output to it. So will people be able to dump items from it in the future using game coins/tokens? (Are you guys waiting for it to have a beefy amount of items before establishing this system?)

Make sure to keep free items out of the dumpster (pandora items) before release to keep the dumpster from being overfilled with them.

Dump items in the dumpster from banned accounts to help distribute older items that might had been lost for good do to frozen accounts.

A non item/money reward for donating to the dumpster. (Colored Titles, a number depicting how much you donated in your profile. Access to a Good Samaritan subforum.) And if this does happen, add tiers/points for items being donated based on aurum cost and rarity.
So tiers from lowest to highest common items > token shop items > event items > anka egg items > monthlies > special items (Japan items, jackets from God Wars, ect.) > Yearlies.
And offset this by losing points for taking things out of the dumpster. (Can't go below zero to negative points.)

Just some thoughts :P