Of course, it's not like you just exchange it as 1 for 1, maybe you can exchange a T4 weapon with a little gold, at this point that T4 weapon can be considered a discount coupon.
#Trade-In: Swap Your Old item for New Powerhouses!
upbeat dune
For example: I have a T3 weapon like skadi, I can exchange it to hussar by removing that skadi + a little gold = new hussar
I have quite a few ideas to improve events instead of just having gacha after gacha. For example, take a different kind of event: imagine a cargo ship in the black market. Instead of simply giving out keys to open chests, why not split them into random orders that refresh daily, which players can purchase using a different special resource? In this case, keys would serve as a resource to reroll the orders.
Another mechanic could be that for each "like" an order receives, it gets a small percentage discount for a limited time before it’s sold out.