You're right that this could be done without NFTs, for sure! You could have them as digital assets within the game, like MTG: Online, and trade them. The main benefit of using a blockchain is that you don't have to build a store and manage payment processing yourself.
Edit: Also, if the games servers died so would your collection of cards. If for whatever reason the devs killed Gods Unchained someone could build a fork and we'd be able to take our cards over there because the asset is decoupled from the game. Bit of an edge case but in a world where people complain that digital ownership is false (such as ebooks) then it could be a fun solution.
Edit: Also, if the games servers died so would your collection of cards. If for whatever reason the devs killed Gods Unchained someone could build a fork and we'd be able to take our cards over there because the asset is decoupled from the game. Bit of an edge case but in a world where people complain that digital ownership is false (such as ebooks) then it could be a fun solution.