  Non-fungible tokens(NFTs) are on the rise. They can represent artworks
exhibited for marketing purposes on webpages of companies or online stores --
analogously to physical artworks. Lending of NFTs is an attractive form of
passive income for owners but comes with risks (e.g., items are not returned)
and costs for escrow agents. Similarly, renters have difficulties in
anticipating the impact of artworks, e.g., how spectators of NFTs perceive
them. To address these challenges, we introduce an NFT rental solution based on
a pay-per-like pricing model using blockchain technology, i.e., smart contracts
based on the Ethereum chain. We find that blockchain solutions enjoy many
advantages also reported for other applications, but interestingly, we also
observe dark sides of (large) blockchain fees. Blockchain solutions appear
unfair to niche artists and potentially hamper cultural diversity. Furthermore,
a trust-cost tradeoff arises to handle fraud caused by manipulation from
parties outside the blockchain. All code for the solution is publicly available
at: https://github.com/asopi/rental-project
