The big thing I’ve seen for gaming is the idea that you can have tokens not tied to a specific game. Like maybe an achievement gotten in resident evil unlocks a cool skin dead by daylight.
Or you could implement something like Sword Art Onlines’s item/skills system where they attached to a user and not a server, and servers can choose which ones to implement in their version of the game.
Of course its also possible it could be sold second hand, so maybe you think the Christmas skin of a popular character is stupid and will never wear it, but someone else just missed the event. You could sell/gift it to them, because the entitlement is yours to do whatever you want with it. Maybe you just hate the hell out it so much you offer a ton of cash just lock them all up. Idk this part of it just not my jam tbh