@allenu Apps like that predate NFTs, e.g. https://play.toppsapps.com/app/swct
They don't have the fraud and theft problems because they're all on one server. Because they also don't offer pump and dump false promises of fabulous riches, they're niche as you'd expect.
Line Go Up mentioned these digital collectible markets and I'd say they're no more problematic than beanie babies. NTFs are unworkable frauds.