The item was removed from Cash Shop on April 22nd 2020 WITHOUT NOTICE. The notice was ninja added in the patch notes almost 20 days later (May 7th): https://maplestory.nexon.net/news/57261/updated-may-15-v-213-15th-anniversary-pixel-party-patch-notes#content
(taken from the link above)
"[Updated May 7] Mix Dye Coupon and Mystery Mix Dye Coupon have been removed from the Cash Shop. They will be available for a limited time in future sales."
This has never happened. Only Mystery ticket has ever been released again. No trace of the normal one, which is also the only chance to get any mix dye different from 50:50.
Like title, I would suggest releasing bigger bags to hold more Titles and Coins.
Title bags are kinda outdated, only up to 20 slots vs all the other important bags (souls, chairs) that can hold up to 40, especially considering the vast amount of titles we're getting from events.
Coin bags only have up to 10 slots, that's not really suitable for all the daily stuff + old event coins, moreso for the many people who stack up a lot of DreamDefender and SpiritSavior coins.
Item type: NX item
Item name: Mix Dye Item Coupon
New addition, the idea came from character simulators.
Essentially, much like the Mix Dye Hair/Lens coupons, or any pet dye coupon, this item would allow us to customize the color of both normal and NX equipment items.
Example in the picture: I tried changing color of a Falling Darkness Cape.