The tokens you acquire are worth nothing.
Nothing about owning a token grants you any rights to anything other than what some other person is willing to pay/exchange it for.
So if a game developer chooses to accept tokens, you can use them; but that developer can at any time choose to stop accepting tokens or a subset of tokens making what you own worth actually nothing.
Now... for a regulated system of tokens (eg currency) a developer can’t do that: they are legally bound to accept fiat currency even though it is not redeemable for any “real” equivalent (eg gold).
Since a token is not bound to the DRM access to an item (say, image for example), it’s totally pointless to asset ownership with it, because it does not prevent the copy of the original digital asset.
The best you could ever hope for would be a regulated system, in which access to an asset via DRM was granted by a token.
...at which point, any “decentralised” benefit is lost.
So ultimately, the risk is 100% on the buyer here.
What you buy may be redeemable for something for some period of time... but that is true of any kind of token.
The “uniqueness” of the NFT is an illusion; it does not offer any strong guarantee of uniquely representing an actual asset.