when lensy started one thing that i thought it would be interesting was an option for stock photography. as it is an NFT with an ID on the chain. So i think there would be a way of making something that would track the use of it. So you buy a stock photo to use for what ever and you prove ownership by NFT.
There was talk of making an option of "unlimited" numbers (for stock) of copies in a way that you mint the first one and then every time someone buys it, new NFT for that photo is minted... think no work was done on that front.