And Dropbox could be replicated with a couple of servers and rsync... There's a lot more complexity to building a global game/item reselling marketplace than p

And Dropbox could be replicated with a couple of servers and rsync... There's a lot more complexity to building a global game/item reselling marketplace than proving ownership once. NFTs give a consistent, 100% uptime, permissionless, platform where the APIs never change and participants don't get bored and turn off their "xml signing server" because it's not profitable any more.