Selling digital goods for real money is pretty well tread. What does web3/crypto add here?

Game assets can't be used in another game. You need full support from the game developer. The devs could much more easily and cheaply sell the assets direct or support trading.

If the game is distributed or has private servers or something that might warrant defi trades, but wouldn't gamers just hack their own items? If they control the server code, surely it's possible.

Seems like a marketing gimmick at best. What am I missing?