This sounds like a smart idea. That's probably why the NFT hype train didn't do it.

Looks like at least some of the valuable ones did though. The json payload is on ipfs, then the image url is ipfs://. Example: https://bafybeihpjhkeuiq3k6nqa3fkgeigeri7iebtrsuyuey5y6vy36n... (they stored an ipfs hash only, this link is just a random viewer pointed at it)

Btw it's weirdly annoying to get the json payload for one of these